diff --git a/tool/resources/org/antlr/v4/tool/templates/codegen/Cpp/Cpp.stg b/tool/resources/org/antlr/v4/tool/templates/codegen/Cpp/Cpp.stg
index e557fc811d..6ab956f0dc 100644
--- a/tool/resources/org/antlr/v4/tool/templates/codegen/Cpp/Cpp.stg
+++ b/tool/resources/org/antlr/v4/tool/templates/codegen/Cpp/Cpp.stg
@@ -111,8 +111,6 @@ private:
 
 Lexer(lexer, atn, actionFuncs, sempredFuncs, superClass = {Lexer}) ::= <<
 
-using namespace antlr4;
-
 namespace {
 
 struct <lexer.name; format = "cap">StaticData final {