diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixFunctionInfo.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixFunctionInfo.java
index ea2b3b2..4655c37 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixFunctionInfo.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixFunctionInfo.java
@@ -62,7 +62,8 @@
 
     @Override
     public String toString() {
-        return this.functionIdentifier.getNamespace() + ":" + this.functionIdentifier.getName();
+        return this.functionIdentifier.getNamespace() + ":" + this.functionIdentifier.getName() + "@"
+                + this.functionIdentifier.getArity();
     }
 
 }