diff --git a/lib/fimg-math.c b/lib/fimg-math.c
index 33073e4..0062e7c 100644
--- a/lib/fimg-math.c
+++ b/lib/fimg-math.c
@@ -39,10 +39,12 @@ switch (head->type) {
 		if (head->G[foo] > maxval) maxval = head->G[foo];
 		if (head->B[foo] > maxval) maxval = head->B[foo];
 		}
+		break;
 	case FIMG_TYPE_GRAY:
 		for (foo=0; foo<surface; foo++) {
 		if (head->R[foo] > maxval) maxval = head->R[foo];
 		}
+		break;
 	}
 
 return maxval;