diff --git a/Fonderie/glitches.c b/Fonderie/glitches.c
index 63d7c85..3762afc 100644
--- a/Fonderie/glitches.c
+++ b/Fonderie/glitches.c
@@ -49,8 +49,10 @@ float		ftmp;
 fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pvictime, bits);
 #endif
 
-fprintf(stderr, "--- %s: hauteur image = %d fval = %f\n", __func__,
-			pvictime->height, fval);
+if (verbosity > 1) {
+	fprintf(stderr, "--> %s: hauteur image = %d fval = %f\n",
+			__func__, pvictime->height, fval);
+	}
 
 line = rand() % pvictime->height;