diff --git a/scss/_reboot.scss b/scss/_reboot.scss
index 3b55c5756d..1922773b62 100644
--- a/scss/_reboot.scss
+++ b/scss/_reboot.scss
@@ -239,6 +239,9 @@ pre {
   margin-bottom: 1rem;
   // Don't allow content to break outside
   overflow: auto;
+  // We have @viewport set which causes scrollbars to overlap content in IE11 and Edge, so
+  // we force a non-overlapping, non-auto-hiding scrollbar to counteract.
+  -ms-overflow-style: scrollbar;
 }