diff --git a/src/Slider.jsx b/src/Slider.jsx
index b5ff2ef..141fe43 100644
--- a/src/Slider.jsx
+++ b/src/Slider.jsx
@@ -339,7 +339,7 @@ class Slider extends React.Component {
     const lowerOffset = this.calcOffset(lowerBound);
 
     const handleClassName = prefixCls + '-handle';
-    const isNoTip = (step === null) && !tipFormatter;
+    const isNoTip = tipFormatter === null || (step === null && !tipFormatter);
 
     const upper = (<Handle className={handleClassName}
                            noTip={isNoTip} tipTransitionName={tipTransitionName} tipFormatter={tipFormatter}