diff --git a/frappe/__init__.py b/frappe/__init__.py
index dda36cf3d91..668245858c9 100644
--- a/frappe/__init__.py
+++ b/frappe/__init__.py
@@ -2427,8 +2427,8 @@ def _register_fault_handler():
 	import sys
 
 	# Some libraries monkey patch stderr, we need actual fd
-	if isinstance(sys.stderr, io.TextIOWrapper):
-		faulthandler.register(signal.SIGUSR1, file=sys.stderr)
+	if isinstance(sys.__stderr__, io.TextIOWrapper):
+		faulthandler.register(signal.SIGUSR1, file=sys.__stderr__)
 
 
 if _tune_gc: