diff --git a/tools/fimghalfsize.c b/tools/fimghalfsize.c
index e070e26..efba6e9 100644
--- a/tools/fimghalfsize.c
+++ b/tools/fimghalfsize.c
@@ -1,4 +1,5 @@
 /*
+ * halfsizing an fimg picture.
 */
 
 #include  <stdio.h>
@@ -41,7 +42,7 @@ if (foo) {
 	return -1;
 	}
 
-return -1;
+return 0;
 }
 
 /* ------------------------------------------------------------- */