diff --git a/XD.c b/XD.c
index 122fbce..362fe79 100644
--- a/XD.c
+++ b/XD.c
@@ -222,7 +222,7 @@ main(int argc, char *argv[])
   int code = -1;
 
   /* print version information */
-  if (strcmp(argv[1], "-v") == 0) {
+  if (argc > 1 && strcmp(argv[1], "-v") == 0) {
     printf("XD [number] v%s\n", VERSION);
     return 0;
   }