diff --git a/lua/telescope/pickers/scroller.lua b/lua/telescope/pickers/scroller.lua
index d9e5a64..324627b 100644
--- a/lua/telescope/pickers/scroller.lua
+++ b/lua/telescope/pickers/scroller.lua
@@ -50,7 +50,7 @@ scroller.create = function(strategy, sorting_strategy)
       return row
     end
   else
-    error("Unsupported strategy: ", strategy)
+    error("Unsupported strategy: " .. strategy)
   end
 end