diff --git a/src/group_gui.cpp b/src/group_gui.cpp
index 1210087957..8ef6a2a1bc 100644
--- a/src/group_gui.cpp
+++ b/src/group_gui.cpp
@@ -981,6 +981,7 @@ public:
 		/* abort drag & drop */
 		this->vehicle_sel = INVALID_VEHICLE;
 		this->DirtyHighlightedGroupWidget();
+		this->group_sel = INVALID_GROUP;
 		this->group_over = INVALID_GROUP;
 		this->SetWidgetDirty(WID_GL_LIST_VEHICLE);
 	}