diff --git a/Fonderie/sfx.c b/Fonderie/sfx.c
index 274fd985..af141520 100644
--- a/Fonderie/sfx.c
+++ b/Fonderie/sfx.c
@@ -96,7 +96,7 @@ for (foo=0; foo<size; foo++) {
 
 	}
 
-return -1;
+return 0;
 }
 /* -------------------------------------------------------------- */
 int binarize(FloatImg *pimg, int notused)