diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 0f2f050..0c267fc 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -531,6 +531,7 @@
     PyLong_Fini();
     PyFloat_Fini();
     PyDict_Fini();
+    PySlice_Fini();
 
     /* Cleanup Unicode implementation */
     _PyUnicode_Fini();