diff --git a/src/gaaout.c b/src/gaaout.c
index f9c03d3..cc8798b 100644
--- a/src/gaaout.c
+++ b/src/gaaout.c
@@ -138,8 +138,8 @@ void gaa_help(void)
 	__gaa_helpsingle('k', "key", _("KEY1 KEY2...KEYN "), _("Specify the key(s)"));
 	__gaa_helpsingle(0, "noiv", "", _("Do not use an IV."));
 	__gaa_helpsingle('b', "bare", "", _("Do not keep algorithm information in the encrypted file."));
-	__gaa_helpsingle('z', "gzip", "", _("Use gzip to compress files before encryption."));
-	__gaa_helpsingle('p', "bzip2", "", _("Use bzip2 to compress files before encryption."));
+	__gaa_helpsingle('z', "gzip", "", _("Use gzip to compress/decompress files before/after encryption/decryption. NOTE: cannot be used if openpgp mode is active."));
+	__gaa_helpsingle('p', "bzip2", "", _("Use bzip2 to compress/decompress files before/after encryption/decryption. NOTE: cannot be used if openpgp mode is active."));
 	__gaa_helpsingle(0, "flush", "", _("Immediately flush the output"));
 	__gaa_helpsingle('l', "doublecheck", "", _("Double check passwords."));
 	__gaa_helpsingle('u', "unlink", "", _("Unlink the input file after encryption or decryption."));
diff --git a/src/mcrypt.c b/src/mcrypt.c
index f3af1ba..2a5fa46 100644
--- a/src/mcrypt.c
+++ b/src/mcrypt.c
@@ -552,11 +552,15 @@ int main(int argc, char **argv)
 	       continue;
 	    }
 #ifdef ZIP
+	    if ((openpgp != 0) && ( gzipflag == TRUE || bzipflag == TRUE )) {
+		err_quit(_("Error: Cannot use -z with openpgp mode (does not call gzip or bzip)\n"));
+	    }
+
 	    if (stream_flag == FALSE) {
 	       if (gzipflag == TRUE)
-		  strcat(outfile, ".gz");
+		  if (openpgp == 0) strcat(outfile, ".gz");
 	       if (bzipflag == TRUE)
-		  strcat(outfile, ".bz2");
+		  if (openpgp == 0) strcat(outfile, ".bz2");
 	    }
 #endif
 	    strcat(outfile, ".nc");