diff --git a/temp-squares/fcore/quad-tree.sml b/temp-squares/fcore/quad-tree.sml
index 2b7e2af..b922b2c 100644
--- a/temp-squares/fcore/quad-tree.sml
+++ b/temp-squares/fcore/quad-tree.sml
@@ -225,7 +225,7 @@ struct
           foldWithDuplicates (f, br, acc)
         end
 
-  fun insertItemIntoTree ignoreData (item, acc) =
+  fun insertItemIntoTree (item, acc) =
     if #data item = 0 then 
       (* ignore specific data by not inserting it into tree.
        * May later functorise this quad tree,
diff --git a/temp-squares/temp.mlb b/temp-squares/temp.mlb
index 9e9149d..f54e6b1 100644
--- a/temp-squares/temp.mlb
+++ b/temp-squares/temp.mlb
@@ -19,5 +19,6 @@ message-types/file-msg.sml
 message-types/input-msg.sml
 message-types/update-msg.sml
 
+fcore/quad-tree.sml
 fcore/app-update.sml