1 files changed, 1 insertions, 1 deletions
diff --git a/expand.c b/expand.c
index 0387368..a7cfcdb 100644
--- a/expand.c
+++ b/expand.c
@@ -424,7 +424,7 @@ expand_argument (str, end)
 {
   char *tmp;
 
-  if (*end == '\0')
+  if (!end || *end == '\0')
     tmp = str;
   else
     {