diff --git a/tool/resources/org/antlr/v4/tool/templates/codegen/Python3/Python3.stg b/tool/resources/org/antlr/v4/tool/templates/codegen/Python3/Python3.stg
index 34e525b85..3f2acec78 100644
--- a/tool/resources/org/antlr/v4/tool/templates/codegen/Python3/Python3.stg
+++ b/tool/resources/org/antlr/v4/tool/templates/codegen/Python3/Python3.stg
@@ -119,7 +119,10 @@ Parser(parser, funcs, atn, sempredFuncs, superClass) ::= <<
 
 Parser_(parser, funcs, atn, sempredFuncs, ctor, superClass) ::= <<
 <if(superClass)>
-from .<superClass> import <superClass>
+if __name__ is not None and "." in __name__:
+    from .<superClass> import <superClass>
+else:
+    from <superClass> import <superClass>
 
 <endif>
 <atn>