1 files changed, 3 insertions, 0 deletions
diff --git a/lib/strdup.c b/lib/strdup.c
index a9ed448a8..e16e08a72 100644
--- a/lib/strdup.c
+++ b/lib/strdup.c
@@ -30,6 +30,9 @@ char *curlx_strdup(const char *str)
   int len;
   char *newstr;
 
+  if (!str)
+    return (char *)NULL;
+
   len = strlen(str);
   newstr = (char *) malloc((len+1)*sizeof(char));
   if (!newstr)