diff --git a/src/SelectionManager.ts b/src/SelectionManager.ts
index 314897ec..9cfa5302 100644
--- a/src/SelectionManager.ts
+++ b/src/SelectionManager.ts
@@ -348,6 +348,9 @@ export class SelectionManager extends EventEmitter {
       return;
     }
 
+    // Tell the browser not to start a regular selection
+    event.preventDefault();
+
     // Reset drag scroll state
     this._dragScrollAmount = 0;