diff --git a/games/minimal/mods/test/formspec.lua b/games/minimal/mods/test/formspec.lua
index 53e92b24..4ab4f271 100644
--- a/games/minimal/mods/test/formspec.lua
+++ b/games/minimal/mods/test/formspec.lua
@@ -251,7 +251,7 @@ Number]
 			"box[1,22.5;4,1;#a00a]"..
 		"scroll_container_end[]"..
 		"scrollbaroptions[max=170]".. -- lowest seen pos is: 0.1*170+6=23 (factor*max+height)
-		"scrollbar[7.5,0;0.3,4;vertical;scrbar;0]"..
+		"scrollbar[7.5,0;0.3,4;vertical;scrbar;20]"..
 		"scrollbar[8,0;0.3,4;vertical;scrbarhmmm;0]"..
 		"dropdown[0,6;2;hmdrpdwnnn;apple,bulb;1]",
 }
diff --git a/src/gui/guiScrollContainer.h b/src/gui/guiScrollContainer.h
index 9eaa880b..a0306291 100644
--- a/src/gui/guiScrollContainer.h
+++ b/src/gui/guiScrollContainer.h
@@ -38,7 +38,11 @@ public:
 			updateScrolling();
 	}
 
-	inline void setScrollBar(GUIScrollBar *scrollbar) { m_scrollbar = scrollbar; }
+	inline void setScrollBar(GUIScrollBar *scrollbar)
+	{
+		m_scrollbar = scrollbar;
+		updateScrolling();
+	}
 
 private:
 	enum OrientationEnum