diff --git a/Fonderie/crapulator.c b/Fonderie/crapulator.c
index 931aaaa9..98f8946b 100644
--- a/Fonderie/crapulator.c
+++ b/Fonderie/crapulator.c
@@ -117,9 +117,10 @@ switch (idFx) {
 	case 11:
 		retval = trinarize(image, 0);
 		break;
-			/* --- WTF -- */
 	case 25:
-		retval = vertical_singlitch(image, 250+rand()%15 , fval, 18, 0);
+		/* please make this function more tweakable */
+		retval = vertical_singlitch(image, 290+rand()%35,
+							fval, 0.18, 0);
 		break;
 	default :
 		fprintf(stderr, "%s : effect #%d invalid\n",