diff --git a/http-push.c b/http-push.c
index f9e67cabd4bee8..f5a92529a8406b 100644
--- a/http-push.c
+++ b/http-push.c
@@ -195,7 +195,7 @@ static char *xml_entities(const char *s)
 static void curl_setup_http_get(CURL *curl, const char *url,
 		const char *custom_req)
 {
-	curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
+	curl_easy_setopt(curl, CURLOPT_HTTPGET, 1L);
 	curl_easy_setopt(curl, CURLOPT_URL, url);
 	curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
@@ -205,7 +205,7 @@ static void curl_setup_http(CURL *curl, const char *url,
 		const char *custom_req, struct buffer *buffer,
 		curl_write_callback write_fn)
 {
-	curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
+	curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
 	curl_easy_setopt(curl, CURLOPT_URL, url);
 	curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
 	curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
@@ -213,9 +213,9 @@ static void curl_setup_http(CURL *curl, const char *url,
 	curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_buffer);
 	curl_easy_setopt(curl, CURLOPT_SEEKDATA, buffer);
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
-	curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
+	curl_easy_setopt(curl, CURLOPT_NOBODY, 0L);
 	curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
-	curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
+	curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
 }
 
 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
diff --git a/http.c b/http.c
index 3c029cf8947df7..d88e79fbde9c4c 100644
--- a/http.c
+++ b/http.c
@@ -1019,13 +1019,13 @@ static CURL *get_curl_handle(void)
 		die("curl_easy_init failed");
 
 	if (!curl_ssl_verify) {
-		curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
-		curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
+		curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0L);
+		curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0L);
 	} else {
 		/* Verify authenticity of the peer's certificate */
-		curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
+		curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1L);
 		/* The name in the cert must match whom we tried to connect */
-		curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
+		curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2L);
 	}
 
     if (curl_http_version) {
@@ -1057,7 +1057,7 @@ static CURL *get_curl_handle(void)
 
 	if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
 	    !http_schannel_check_revoke) {
-		curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NO_REVOKE);
+		curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, (long)CURLSSLOPT_NO_REVOKE);
 	}
 
 	if (http_proactive_auth != PROACTIVE_AUTH_NONE)
@@ -1117,8 +1117,8 @@ static CURL *get_curl_handle(void)
 				 curl_low_speed_time);
 	}
 
-	curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
-	curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
+	curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20L);
+	curl_easy_setopt(result, CURLOPT_POSTREDIR, (long)CURL_REDIR_POST_ALL);
 
 #ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
 	{
@@ -1151,7 +1151,7 @@ static CURL *get_curl_handle(void)
 		user_agent ? user_agent : git_user_agent());
 
 	if (curl_ftp_no_epsv)
-		curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
+		curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0L);
 
 	if (curl_ssl_try)
 		curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
@@ -1193,18 +1193,18 @@ static CURL *get_curl_handle(void)
 
 		if (starts_with(curl_http_proxy, "socks5h"))
 			curl_easy_setopt(result,
-				CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
+				CURLOPT_PROXYTYPE, (long)CURLPROXY_SOCKS5_HOSTNAME);
 		else if (starts_with(curl_http_proxy, "socks5"))
 			curl_easy_setopt(result,
-				CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
+				CURLOPT_PROXYTYPE, (long)CURLPROXY_SOCKS5);
 		else if (starts_with(curl_http_proxy, "socks4a"))
 			curl_easy_setopt(result,
-				CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
+				CURLOPT_PROXYTYPE, (long)CURLPROXY_SOCKS4A);
 		else if (starts_with(curl_http_proxy, "socks"))
 			curl_easy_setopt(result,
-				CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
+				CURLOPT_PROXYTYPE, (long)CURLPROXY_SOCKS4);
 		else if (starts_with(curl_http_proxy, "https")) {
-			curl_easy_setopt(result, CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
+			curl_easy_setopt(result, CURLOPT_PROXYTYPE, (long)CURLPROXY_HTTPS);
 
 			if (http_proxy_ssl_cert)
 				curl_easy_setopt(result, CURLOPT_PROXY_SSLCERT, http_proxy_ssl_cert);
@@ -1254,7 +1254,7 @@ static CURL *get_curl_handle(void)
 	}
 	init_curl_proxy_auth(result);
 
-	curl_easy_setopt(result, CURLOPT_TCP_KEEPALIVE, 1);
+	curl_easy_setopt(result, CURLOPT_TCP_KEEPALIVE, 1L);
 
 	if (curl_tcp_keepidle > -1)
 		curl_easy_setopt(result, CURLOPT_TCP_KEEPIDLE,
@@ -1540,9 +1540,9 @@ struct active_request_slot *get_active_slot(void)
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 	curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 	curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, -1L);
-	curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
-	curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
-	curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
+	curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0L);
+	curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1L);
+	curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1L);
 	curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
 
 	/*
@@ -1551,9 +1551,9 @@ struct active_request_slot *get_active_slot(void)
 	 * HTTP_FOLLOW_* cases themselves.
 	 */
 	if (http_follow_config == HTTP_FOLLOW_ALWAYS)
-		curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
+		curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1L);
 	else
-		curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
+		curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0L);
 
 	curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
 	curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
@@ -2120,12 +2120,12 @@ static int http_request(const char *url,
 	int ret;
 
 	slot = get_active_slot();
-	curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
+	curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1L);
 
 	if (!result) {
-		curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
+		curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1L);
 	} else {
-		curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
+		curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0L);
 		curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, result);
 
 		if (target == HTTP_REQUEST_FILE) {
@@ -2151,7 +2151,7 @@ static int http_request(const char *url,
 		strbuf_addstr(&buf, " no-cache");
 	if (options && options->initial_request &&
 	    http_follow_config == HTTP_FOLLOW_INITIAL)
-		curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
+		curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1L);
 
 	headers = curl_slist_append(headers, buf.buf);
 
@@ -2170,7 +2170,7 @@ static int http_request(const char *url,
 	curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 	curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
-	curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
+	curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0L);
 
 	ret = run_one_slot(slot, &results);
 
@@ -2750,7 +2750,7 @@ struct http_object_request *new_http_object_request(const char *base_url,
 	freq->headers = object_request_headers();
 
 	curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEDATA, freq);
-	curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
+	curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0L);
 	curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
 	curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
 	curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
diff --git a/imap-send.c b/imap-send.c
index 27dc033c7f8e33..2e812f5a6e9e10 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -1420,7 +1420,7 @@ static CURL *setup_curl(struct imap_server_conf *srvc, struct credential *cred)
 
 	curl_easy_setopt(curl, CURLOPT_URL, path.buf);
 	strbuf_release(&path);
-	curl_easy_setopt(curl, CURLOPT_PORT, srvc->port);
+	curl_easy_setopt(curl, CURLOPT_PORT, (long)srvc->port);
 
 	if (srvc->auth_method) {
 		struct strbuf auth = STRBUF_INIT;
@@ -1433,8 +1433,8 @@ static CURL *setup_curl(struct imap_server_conf *srvc, struct credential *cred)
 	if (!srvc->use_ssl)
 		curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_TRY);
 
-	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, srvc->ssl_verify);
-	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, srvc->ssl_verify);
+	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, (long)srvc->ssl_verify);
+	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, (long)srvc->ssl_verify);
 
 	curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
 
diff --git a/remote-curl.c b/remote-curl.c
index 590b228f67fcbc..b8bc3a80cf4142 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -877,12 +877,12 @@ static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 	headers = curl_slist_append(headers, rpc->hdr_content_type);
 	headers = curl_slist_append(headers, rpc->hdr_accept);
 
-	curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
-	curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
+	curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0L);
+	curl_easy_setopt(slot->curl, CURLOPT_POST, 1L);
 	curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 	curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 	curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
-	curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
+	curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4L);
 	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &buf);
@@ -970,8 +970,8 @@ static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_rece
 
 	slot = get_active_slot();
 
-	curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
-	curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
+	curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0L);
+	curl_easy_setopt(slot->curl, CURLOPT_POST, 1L);
 	curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 	curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
 
@@ -1058,7 +1058,7 @@ static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_rece
 	rpc_in_data.check_pktline = stateless_connect;
 	memset(&rpc_in_data.pktline_state, 0, sizeof(rpc_in_data.pktline_state));
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &rpc_in_data);
-	curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
+	curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0L);
 
 
 	rpc->any_written = 0;