1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/functools.py b/Lib/functools.py
index b42b9ea..a80e1a6 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -285,7 +285,7 @@ class partial:
         if not callable(func):
             raise TypeError("the first argument must be callable")
 
-        if hasattr(func, "func"):
+        if isinstance(func, partial):
             args = func.args + args
             keywords = {**func.keywords, **keywords}
             func = func.func