diff --git a/lib/formdata.c b/lib/formdata.c
index d8df7e3da9795fb91d29a025d7db160fe073a6ad..c883ec78ca87b4e3374e762506c6a705a0948af1 100644
--- a/lib/formdata.c
+++ b/lib/formdata.c
@@ -637,7 +637,7 @@ CURLFORMcode FormAdd(struct curl_httppost **httppost,
   struct curl_httppost *post = NULL;
   CURLformoption option;
   struct curl_forms *forms = NULL;
-  char *array_value; /* value read from an array */
+  char *array_value=NULL; /* value read from an array */
 
   /* This is a state variable, that if TRUE means that we're parsing an
      array that we got passed to us. If FALSE we're parsing the input