diff --git a/create_short.c b/create_short.c
index 0833cf1..45fff7a 100644
--- a/create_short.c
+++ b/create_short.c
@@ -63,7 +63,8 @@ int main(int ac, char **av)
     if (content == NULL)
         return 1;
 
-    strcat(content, BUTTON);
+    if (strlen(content) == MAX_SIZE)
+        strcat(content, BUTTON);
 
     int ret = write_file("README.md", content);
     free(content);