diff --git a/src/components/inputnumber/InputNumber.vue b/src/components/inputnumber/InputNumber.vue
index ab4efb1a9..b50eff2e8 100755
--- a/src/components/inputnumber/InputNumber.vue
+++ b/src/components/inputnumber/InputNumber.vue
@@ -547,7 +547,7 @@ export default {
             return this.min === null || this.min < 0;
         },
         isMinusSign(char) {
-            if (this._minusSign.test(char)) {
+            if (this._minusSign.test(char) || char === '-') {
                 this._minusSign.lastIndex = 0;
                 return true;
             }