diff --git a/src/SelectionManager.ts b/src/SelectionManager.ts
index ee03f79a..f3aa5f82 100644
--- a/src/SelectionManager.ts
+++ b/src/SelectionManager.ts
@@ -327,7 +327,7 @@ export class SelectionManager extends EventEmitter implements ISelectionManager
 
     // Allow selection when using a specific modifier key, even when disabled
     if (!this._enabled) {
-      const shouldForceSelection = Browser.isMac && event.altKey;
+      const shouldForceSelection = Browser.isMac ? event.altKey : event.shiftKey;
 
       if (!shouldForceSelection) {
         return;