diff --git a/packages/popper/src/utils/getBoundaries.js b/packages/popper/src/utils/getBoundaries.js
index 426865ac6f..a05b13f974 100644
--- a/packages/popper/src/utils/getBoundaries.js
+++ b/packages/popper/src/utils/getBoundaries.js
@@ -50,7 +50,7 @@ export default function getBoundaries(
 
     // In case of HTML, we need a different computation
     if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
-      const { height, width } = getWindowSizes(false);
+      const { height, width } = getWindowSizes();
       boundaries.top += offsets.top - offsets.marginTop;
       boundaries.bottom = height + offsets.top;
       boundaries.left += offsets.left - offsets.marginLeft;
diff --git a/packages/popper/src/utils/getWindowSizes.js b/packages/popper/src/utils/getWindowSizes.js
index 8375db65ca..2be386e44e 100644
--- a/packages/popper/src/utils/getWindowSizes.js
+++ b/packages/popper/src/utils/getWindowSizes.js
@@ -1,12 +1,12 @@
 import isIE10 from './isIE10';
 
-function getSize(axis, body, html, computedStyle, includeScroll) {
+function getSize(axis, body, html, computedStyle) {
   return Math.max(
     body[`offset${axis}`],
-    includeScroll ? body[`scroll${axis}`] : 0,
+    body[`scroll${axis}`],
     html[`client${axis}`],
     html[`offset${axis}`],
-    includeScroll ? html[`scroll${axis}`] : 0,
+    html[`scroll${axis}`],
     isIE10()
       ? html[`offset${axis}`] +
         computedStyle[`margin${axis === 'Height' ? 'Top' : 'Left'}`] +
@@ -15,13 +15,13 @@ function getSize(axis, body, html, computedStyle, includeScroll) {
   );
 }
 
-export default function getWindowSizes(includeScroll = true) {
+export default function getWindowSizes() {
   const body = window.document.body;
   const html = window.document.documentElement;
   const computedStyle = isIE10() && window.getComputedStyle(html);
 
   return {
-    height: getSize('Height', body, html, computedStyle, includeScroll),
-    width: getSize('Width', body, html, computedStyle, includeScroll),
+    height: getSize('Height', body, html, computedStyle),
+    width: getSize('Width', body, html, computedStyle),
   };
 }