diff --git a/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/rewrites/AqlRewriter.java b/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/rewrites/AqlRewriter.java
index 84d8321..1a5babe 100644
--- a/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/rewrites/AqlRewriter.java
+++ b/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/rewrites/AqlRewriter.java
@@ -145,6 +145,7 @@
                 // loop until no more changes
             }
         }
+        declaredFunctions.removeAll(otherFDecls);
     }
 
     private void buildOtherUdfs(Expression expression, List<FunctionDecl> functionDecls,