diff --git a/ext/standard/mail.c b/ext/standard/mail.c
index 67a2160028c..652febfcedd 100644
--- a/ext/standard/mail.c
+++ b/ext/standard/mail.c
@@ -132,7 +132,7 @@ PHP_FUNCTION(mail)
 
 /* {{{ php_mail
  */
-int php_mail(char *to, char *subject, char *message, char *headers, char *extra_cmd)
+PHPAPI int php_mail(char *to, char *subject, char *message, char *headers, char *extra_cmd)
 {
 #ifdef PHP_WIN32
 	int tsm_err;
diff --git a/ext/standard/php_mail.h b/ext/standard/php_mail.h
index 330482c202a..5e5a0e54cae 100644
--- a/ext/standard/php_mail.h
+++ b/ext/standard/php_mail.h
@@ -26,7 +26,7 @@
 PHP_FUNCTION(mail);
 PHP_FUNCTION(ezmlm_hash);
 PHP_MINFO_FUNCTION(mail);
-extern int php_mail(char *to, char *subject, char *message, char *headers, char *extra_cmd);
+PHPAPI extern int php_mail(char *to, char *subject, char *message, char *headers, char *extra_cmd);
 
 #endif