diff --git a/README.md b/README.md
index de542ef..f2a825a 100644
--- a/README.md
+++ b/README.md
@@ -2173,7 +2173,7 @@ def some_func(default_arg=[]):
 
     ```py
     def some_func(default_arg=None):
-        if not default_arg:
+        if default_arg is not None:
             default_arg = []
         default_arg.append("some_string")
         return default_arg