diff --git a/cpp-ch/local-engine/Parser/scalar_function_parser/chr.cpp b/cpp-ch/local-engine/Parser/scalar_function_parser/chr.cpp
index 2f3c43903c5e..d168e63d11dc 100644
--- a/cpp-ch/local-engine/Parser/scalar_function_parser/chr.cpp
+++ b/cpp-ch/local-engine/Parser/scalar_function_parser/chr.cpp
@@ -47,7 +47,7 @@ class FunctionParserChr : public FunctionParser
             throw Exception(DB::ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Function {} requires two or three arguments", getName());
 
         /*
-            parse chr(number) as if(number < 0, '', char(0, number), 'unicode', 'utf-8'))
+            parse chr(number) as if(number < 0, '', convertCharset(char(0, number), 'unicode', 'utf-8'))
         */
         const auto & num_arg = parsed_args[0];
         const auto * const_zero_node = addColumnToActionsDAG(actions_dag, std::make_shared<DataTypeInt32>(), 0);