diff --git a/utils/skinupdater/skinupdater.c b/utils/skinupdater/skinupdater.c
index c354234e27..9329b9a9f0 100644
--- a/utils/skinupdater/skinupdater.c
+++ b/utils/skinupdater/skinupdater.c
@@ -242,7 +242,7 @@ top:
         }
         else if (*in == '#')
         {
-            while (*in != '\n')
+            while (*in && *in != '\n')
             {
                 PUTCH(out, *in++);
             }