diff --git a/kitty/child.py b/kitty/child.py
index e75cebb6a..f8fd0a5a8 100644
--- a/kitty/child.py
+++ b/kitty/child.py
@@ -564,8 +564,8 @@ class Child:
         return True
 
     def reset_termios_state(self) -> None:
-        if s := getattr(self, 'initial_termios_state', None):
+        if (s := getattr(self, 'initial_termios_state', None)) and self.child_fd is not None:
             try:
-                termios.tcsetattr(s, termios.TCSANOW)
+                termios.tcsetattr(self.child_fd, termios.TCSANOW, s)
             except OSError:
                 pass
diff --git a/kitty_tests/__init__.py b/kitty_tests/__init__.py
index 1ae16fb86..bd9ce655f 100644
--- a/kitty_tests/__init__.py
+++ b/kitty_tests/__init__.py
@@ -371,7 +371,7 @@ class PTY:
 
     def reset_termios_state(self):
         if s := getattr(self, 'initial_termios_state', None):
-            termios.tcsetattr(self.master_fd, s)
+            termios.tcsetattr(self.master_fd, termios.TCSANOW, s)
 
     def turn_off_echo(self):
         s = termios.tcgetattr(self.master_fd)