diff --git a/bar.go b/bar.go
index 0c3e9e4..c1dfbb0 100644
--- a/bar.go
+++ b/bar.go
@@ -514,7 +514,7 @@
 }
 
 func percentage(total, current int64, ratio int) int {
-	if current > total {
+	if current > total || (total == 0 && current == 0) {
 		return 0
 	}
 	num := float64(ratio) * float64(current) / float64(total)