diff --git a/boolean_algebra/not_gate.py b/boolean_algebra/not_gate.py
index cfa74cf42204..ba56c3b38e05 100644
--- a/boolean_algebra/not_gate.py
+++ b/boolean_algebra/not_gate.py
@@ -21,7 +21,7 @@ def not_gate(input_1: int) -> int:
     0
     """
 
-    return 1 if input_1 == 0 else 0
+    return int(not bool(input_1))
 
 
 if __name__ == "__main__":