diff --git a/main.c b/main.c
index 103aecf..2ce8ce4 100644
--- a/main.c
+++ b/main.c
@@ -208,7 +208,10 @@ int detect_level(ImageFloat *imgf) {
 		if (ylow == imgf->h - 1) v = imgf->data[(ylow) * imgf->w];
 		v = ((float)avg-1.0) * v/(float)avg + imgf->data[(ylow) * imgf->w]/(float) avg;
 		for (x = 4; x < 16; x++) imgf->data[x + (ylow) * imgf->w] = v;
-		if (v < 0.1) level = ylow;
+		if (v > 0.1) {
+			level = ylow;
+			break;
+		}
 	}
 
 	return level;