diff --git a/src/Functions/FunctionBase58Conversion.h b/src/Functions/FunctionBase58Conversion.h
index 97dc2a4f40c..87a1821b2de 100644
--- a/src/Functions/FunctionBase58Conversion.h
+++ b/src/Functions/FunctionBase58Conversion.h
@@ -19,7 +19,6 @@ namespace ErrorCodes
 {
     extern const int ILLEGAL_COLUMN;
     extern const int ILLEGAL_TYPE_OF_ARGUMENT;
-    extern const int INCORRECT_DATA;
     extern const int BAD_ARGUMENTS;
 }