diff --git a/funcs/filtrage.c b/funcs/filtrage.c
index 0002de1..18ffb44 100644
--- a/funcs/filtrage.c
+++ b/funcs/filtrage.c
@@ -13,7 +13,7 @@ int		x, y, offset;
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p )\n", __func__, img);
-fprintf(stderr,"     type %s size %dx%d\n", img->type,
+fprintf(stderr,"     type %d size %dx%d\n", img->type,
 					img->width, img->height);
 #endif