diff --git a/src/core/platform/web/dom.js b/src/core/platform/web/dom.js
index 945aa359a..d934736c7 100644
--- a/src/core/platform/web/dom.js
+++ b/src/core/platform/web/dom.js
@@ -710,7 +710,7 @@
                     break;
             }
             if (needAdaptHeight === true) {
-                popup.resetHeight && popup.resetHeight(Math.min(viewportBounds.height - position.top + (positionRelativeElement ? positionRelativeElement.getBoundingClientRect().top : 0), maxHeight));
+                popup.resetHeight && popup.resetHeight(Math.min(viewportBounds.height - position.top - (positionRelativeElement ? positionRelativeElement.getBoundingClientRect().top : 0), maxHeight));
             }
             return position;
         },