diff --git a/ext/hash/hash.c b/ext/hash/hash.c
index 75e2e241bec12..ec5391a623049 100644
--- a/ext/hash/hash.c
+++ b/ext/hash/hash.c
@@ -1178,6 +1178,7 @@ static void mhash_init(INIT_FUNC_ARGS)
 	int len;
 	int algo_number = 0;
 
+	zend_string *deprecation_reason = zend_string_init("as the mhash*() functions were deprecated", strlen("as the mhash*() functions were deprecated"), 1);
 	for (algo_number = 0; algo_number < MHASH_NUM_ALGOS; algo_number++) {
 		struct mhash_bc_entry algorithm = mhash_to_hash[algo_number];
 		if (algorithm.mhash_name == NULL) {
@@ -1185,8 +1186,18 @@ static void mhash_init(INIT_FUNC_ARGS)
 		}
 
 		len = slprintf(buf, 127, "MHASH_%s", algorithm.mhash_name);
-		zend_register_long_constant(buf, len, algorithm.value, CONST_PERSISTENT|CONST_DEPRECATED, module_number);
-	}
+		zend_constant *mhash_const = zend_register_long_constant(buf, len, algorithm.value, CONST_PERSISTENT|CONST_DEPRECATED, module_number);
+
+		zend_attribute *deprecation_attrib = zend_add_global_constant_attribute(mhash_const, ZSTR_KNOWN(ZEND_STR_DEPRECATED_CAPITALIZED), 2);
+		ZVAL_STR(&deprecation_attrib->args[0].value, ZSTR_KNOWN(ZEND_STR_8_DOT_5));
+		deprecation_attrib->args[0].name = ZSTR_KNOWN(ZEND_STR_SINCE);
+		ZVAL_STR_COPY(&deprecation_attrib->args[1].value, deprecation_reason);
+		deprecation_attrib->args[1].name = ZSTR_KNOWN(ZEND_STR_MESSAGE);
+	}
+	/* Each of the attributes uses ZVAL_STR_COPY instead of trying to special
+	 * case one of them to use ZVAL_STR, but that means there is one more
+	 * reference that needs to be decremented. */
+	zend_string_release(deprecation_reason);
 
 	/* TODO: this cause #69823 zend_register_internal_module(&mhash_module_entry); */
 }
diff --git a/ext/hash/tests/mhash_001.phpt b/ext/hash/tests/mhash_001.phpt
index 29f0f473380b1..87da672550f65 100644
--- a/ext/hash/tests/mhash_001.phpt
+++ b/ext/hash/tests/mhash_001.phpt
@@ -35,77 +35,77 @@ foreach ($supported_hash_al as $hash=>$wanted) {
 }
 ?>
 --EXPECTF--
-Deprecated: Constant MHASH_MD5 is deprecated in %s on line %d
+Deprecated: Constant MHASH_MD5 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_MD5
 ok
 
 
-Deprecated: Constant MHASH_SHA1 is deprecated in %s on line %d
+Deprecated: Constant MHASH_SHA1 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_SHA1
 ok
 
 
-Deprecated: Constant MHASH_HAVAL256 is deprecated in %s on line %d
+Deprecated: Constant MHASH_HAVAL256 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_HAVAL256
 ok
 
 
-Deprecated: Constant MHASH_HAVAL192 is deprecated in %s on line %d
+Deprecated: Constant MHASH_HAVAL192 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_HAVAL192
 ok
 
 
-Deprecated: Constant MHASH_HAVAL224 is deprecated in %s on line %d
+Deprecated: Constant MHASH_HAVAL224 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_HAVAL224
 ok
 
 
-Deprecated: Constant MHASH_HAVAL160 is deprecated in %s on line %d
+Deprecated: Constant MHASH_HAVAL160 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_HAVAL160
 ok
 
 
-Deprecated: Constant MHASH_RIPEMD160 is deprecated in %s on line %d
+Deprecated: Constant MHASH_RIPEMD160 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_RIPEMD160
 ok
 
 
-Deprecated: Constant MHASH_GOST is deprecated in %s on line %d
+Deprecated: Constant MHASH_GOST is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_GOST
 ok
 
 
-Deprecated: Constant MHASH_TIGER is deprecated in %s on line %d
+Deprecated: Constant MHASH_TIGER is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_TIGER
 ok
 
 
-Deprecated: Constant MHASH_CRC32 is deprecated in %s on line %d
+Deprecated: Constant MHASH_CRC32 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_CRC32
 ok
 
 
-Deprecated: Constant MHASH_CRC32B is deprecated in %s on line %d
+Deprecated: Constant MHASH_CRC32B is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d
 MHASH_CRC32B
diff --git a/ext/hash/tests/mhash_003.phpt b/ext/hash/tests/mhash_003.phpt
index f39e1ff387cb9..1a0983ee54f40 100644
--- a/ext/hash/tests/mhash_003.phpt
+++ b/ext/hash/tests/mhash_003.phpt
@@ -35,77 +35,77 @@ foreach ($supported_hash_al as $hash=>$wanted) {
 }
 ?>
 --EXPECTF--
-Deprecated: Constant MHASH_MD5 is deprecated in %s on line %d
+Deprecated: Constant MHASH_MD5 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_MD5
 ok
 
 
-Deprecated: Constant MHASH_SHA1 is deprecated in %s on line %d
+Deprecated: Constant MHASH_SHA1 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_SHA1
 ok
 
 
-Deprecated: Constant MHASH_HAVAL256 is deprecated in %s on line %d
+Deprecated: Constant MHASH_HAVAL256 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_HAVAL256
 ok
 
 
-Deprecated: Constant MHASH_HAVAL224 is deprecated in %s on line %d
+Deprecated: Constant MHASH_HAVAL224 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_HAVAL224
 ok
 
 
-Deprecated: Constant MHASH_HAVAL192 is deprecated in %s on line %d
+Deprecated: Constant MHASH_HAVAL192 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_HAVAL192
 ok
 
 
-Deprecated: Constant MHASH_HAVAL160 is deprecated in %s on line %d
+Deprecated: Constant MHASH_HAVAL160 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_HAVAL160
 ok
 
 
-Deprecated: Constant MHASH_RIPEMD160 is deprecated in %s on line %d
+Deprecated: Constant MHASH_RIPEMD160 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_RIPEMD160
 ok
 
 
-Deprecated: Constant MHASH_GOST is deprecated in %s on line %d
+Deprecated: Constant MHASH_GOST is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_GOST
 ok
 
 
-Deprecated: Constant MHASH_TIGER is deprecated in %s on line %d
+Deprecated: Constant MHASH_TIGER is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_TIGER
 ok
 
 
-Deprecated: Constant MHASH_CRC32 is deprecated in %s on line %d
+Deprecated: Constant MHASH_CRC32 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_CRC32
 ok
 
 
-Deprecated: Constant MHASH_CRC32B is deprecated in %s on line %d
+Deprecated: Constant MHASH_CRC32B is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 
 Deprecated: Function mhash_keygen_s2k() is deprecated since 8.1 in %s on line %d
 MHASH_CRC32B
diff --git a/ext/hash/tests/mhash_004.phpt b/ext/hash/tests/mhash_004.phpt
index e47d48eb1a5d8..e7aa3c5e2df65 100644
--- a/ext/hash/tests/mhash_004.phpt
+++ b/ext/hash/tests/mhash_004.phpt
@@ -12,7 +12,7 @@ var_dump($algo);
 
 ?>
 --EXPECTF--
-Deprecated: Constant MHASH_MD5 is deprecated in %s on line %d
+Deprecated: Constant MHASH_MD5 is deprecated since 8.5, as the mhash*() functions were deprecated in %s on line %d
 int(1)
 
 Deprecated: Function mhash() is deprecated since 8.1 in %s on line %d