diff --git a/src/AggregateFunctions/AggregateFunctionGroupArrayInsertAt.h b/src/AggregateFunctions/AggregateFunctionGroupArrayInsertAt.h
index d84c99aec57ae95015e6b927ee41ad763cba1f9f..6a5f2fbc899836b8aa0650564967e139ac0098b0 100644
--- a/src/AggregateFunctions/AggregateFunctionGroupArrayInsertAt.h
+++ b/src/AggregateFunctions/AggregateFunctionGroupArrayInsertAt.h
@@ -80,7 +80,7 @@ public:
         }
 
         if (!isUnsignedInteger(arguments[1]))
-            throw Exception("Second argument of aggregate function " + getName() + " must be integer.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
+            throw Exception("Second argument of aggregate function " + getName() + " must be unsigned integer.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
 
         if (default_value.isNull())
             default_value = type->getDefault();