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-rw-r--r--SCons/Tool/yacc.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/SCons/Tool/yacc.py b/SCons/Tool/yacc.py
index 42ef1db03..67ecd8678 100644
--- a/SCons/Tool/yacc.py
+++ b/SCons/Tool/yacc.py
@@ -125,7 +125,7 @@ def yyEmitter(target, source, env) -> tuple:
return _yaccEmitter(target, source, env, ['.yy'], '$YACCHXXFILESUFFIX')
-def get_yacc_path(env, append_paths=False) -> Optional[str]:
+def get_yacc_path(env, append_paths: bool=False) -> Optional[str]:
"""
Returns the path to the yacc tool, searching several possible names.