diff --git a/Fonderie/crapulator.c b/Fonderie/crapulator.c
index 2df3226..d9ec110 100644
--- a/Fonderie/crapulator.c
+++ b/Fonderie/crapulator.c
@@ -197,7 +197,7 @@ switch (idFx) {
 		retval = insitu_filtre3x3(image, 1);
 		break;
 	case 20:
-		retval = octotree_classif(image, 0);
+		retval = octotree_classif(image, 0.5, 0);
 		break;
 
 
@@ -262,6 +262,7 @@ switch (num) {
 	case 18:	return "updown";
 
 	case 20:	return "octoclass";
+	case 25:	return "vsglitch";
 	}
 
 return "???";
diff --git a/Fonderie/sfx.h b/Fonderie/sfx.h
index d1262d3..83458b4 100644
--- a/Fonderie/sfx.h
+++ b/Fonderie/sfx.h
@@ -1,10 +1,10 @@
 /*
  *	sfx.h - special effects for fonderie & interpolator
+ *	---------------------------------------------------
  */
 
-
 int bouger_les_pixels(FloatImg *pimg, int kaboo);
-int octotree_classif(FloatImg *pimg, int notused);
+int octotree_classif(FloatImg *pimg, float fk, int notused);
 
 int mirror_split(FloatImg *pimg, int kaboo);
 int upside_down(FloatImg *pimg);