diff --git a/post-policy.go b/post-policy.go
index 7aa96e0d6..7bf560304 100644
--- a/post-policy.go
+++ b/post-policy.go
@@ -197,8 +197,8 @@ func (p *PostPolicy) SetContentLengthRange(min, max int64) error {
 	if min < 0 {
 		return errInvalidArgument("Minimum limit cannot be negative.")
 	}
-	if max < 0 {
-		return errInvalidArgument("Maximum limit cannot be negative.")
+	if max <= 0 {
+		return errInvalidArgument("Maximum limit cannot be non-positive.")
 	}
 	p.contentLengthRange.min = min
 	p.contentLengthRange.max = max