diff --git a/listframes.lua b/listframes.lua
index 6f1ef62..07aab67 100644
--- a/listframes.lua
+++ b/listframes.lua
@@ -98,7 +98,7 @@ local function updateItemAt(idx, item)
 end
 
 local function clearFrom(idx)
-    estimatedTotalHeight = (idx-1).."?"
+    estimatedTotalHeight = idx-1
     local tw, th = frame.getSize()
     for j = length, idx, -1 do
         backingList[j] = nil