diff --git a/src/widget.cpp b/src/widget.cpp
--- a/src/widget.cpp
+++ b/src/widget.cpp
@@ -782,6 +782,7 @@ NWidgetCore::NWidgetCore(WidgetType tp, 
 	this->index = -1;
 	this->widget_data = widget_data;
 	this->tool_tip = tool_tip;
+	this->scrollbar_index = -1;
 }
 
 /**