diff --git a/src/window.c b/src/window.c
index 2d8f801..4b721ea 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4386,6 +4386,10 @@
     python_window_free(wp);
 #endif
 
+#ifdef FEAT_PYTHON3
+    python3_window_free(wp);
+#endif
+
 #ifdef FEAT_TCL
     tcl_window_free(wp);
 #endif