diff --git a/src/components/fixed-popover.jsx b/src/components/fixed-popover.jsx
index 18f8cba0e..a412ab3f5 100644
--- a/src/components/fixed-popover.jsx
+++ b/src/components/fixed-popover.jsx
@@ -174,7 +174,7 @@ class FixedPopover extends Component {
         top: originRect.height / 2,
       }
       pointerStyle = {
-        transform: 'translate(-12px, 0) rotate(90deg)',
+        transform: 'translate(-12px, -50%) rotate(90deg)',
         top: originRect.height, // Don't divide by 2 because of zoom
       }
       break;