diff --git a/frontend/ui/widget.lua b/frontend/ui/widget.lua
index d740600d5..30a29d879 100644
--- a/frontend/ui/widget.lua
+++ b/frontend/ui/widget.lua
@@ -611,6 +611,10 @@ function InputContainer:_init()
 		end
 	end
 	self.ges_events = new_ges_events
+
+	if not self.dimen then
+		self.dimen = Geom:new{}
+	end
 end
 
 function InputContainer:paintTo(bb, x, y)