diff --git a/src/vs/workbench/browser/parts/editor/multiEditorTabsControl.ts b/src/vs/workbench/browser/parts/editor/multiEditorTabsControl.ts
index 307d4d30f63..26906df9119 100644
--- a/src/vs/workbench/browser/parts/editor/multiEditorTabsControl.ts
+++ b/src/vs/workbench/browser/parts/editor/multiEditorTabsControl.ts
@@ -390,7 +390,7 @@ export class MultiEditorTabsControl extends EditorTabsControl {
 				tabsContainer.classList.remove('scroll');
 
 				if (e.target === tabsContainer) {
-					this.onDrop(e, this.tabsModel.count, tabsContainer);
+					this.onDrop(e, this.groupView.count, tabsContainer);
 				}
 			}
 		}));