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-rw-r--r--lib/formdata.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/formdata.c b/lib/formdata.c
index 2e76994a1..a5ee54602 100644
--- a/lib/formdata.c
+++ b/lib/formdata.c
@@ -689,7 +689,7 @@ CURLFORMcode FormAdd(struct curl_httppost **httppost,
}
if(!(form->flags & (HTTPPOST_FILENAME | HTTPPOST_READFILE |
HTTPPOST_PTRCONTENTS | HTTPPOST_PTRBUFFER |
- HTTPPOST_CALLBACK)) ) {
+ HTTPPOST_CALLBACK)) && form->value) {
/* copy value (without strdup; possibly contains null characters) */
form->value = memdup(form->value, form->contentslength);
if(!form->value) {