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-rw-r--r--lib/altsvc.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/altsvc.c b/lib/altsvc.c
index 28c9276b1..bf869c37a 100644
--- a/lib/altsvc.c
+++ b/lib/altsvc.c
@@ -320,8 +320,8 @@ CURLcode Curl_altsvc_save(struct altsvcinfo *altsvc, const char *file)
/* no cache activated */
return CURLE_OK;
- if((altsvc->flags & CURLALTSVC_READONLYFILE) || !file[0])
- /* marked as read-only or zero length file name */
+ if((altsvc->flags & CURLALTSVC_READONLYFILE) || !file || !file[0])
+ /* marked as read-only, no file or zero length file name */
return CURLE_OK;
out = fopen(file, FOPEN_WRITETEXT);
if(!out)