diff --git a/lib/formdata.c b/lib/formdata.c
index 49d09786e35a60ce721607cc5d1406fde4f7f623..36eac7e1792cb4413074b3933733899f0793df5a 100644
--- a/lib/formdata.c
+++ b/lib/formdata.c
@@ -1458,4 +1458,14 @@ int main(int argc, char **argv)
 
 #endif
 
-#endif /* CURL_DISABLE_HTTP */
+#else  /* CURL_DISABLE_HTTP */
+CURLFORMcode curl_formadd(struct curl_httppost **httppost,
+                          struct curl_httppost **last_post,
+                          ...)
+{
+  (void)httppost;
+  (void)last_post;
+  return CURL_FORMADD_DISABLED;
+}
+
+#endif  /* CURL_DISABLE_HTTP */