diff --git a/Objects/moduleobject.c b/Objects/moduleobject.c
index 30adc92..acb920a 100644
--- a/Objects/moduleobject.c
+++ b/Objects/moduleobject.c
@@ -2,6 +2,7 @@
 /* Module object implementation */
 
 #include "Python.h"
+#include "pycore_interp.h"    // PyInterpreterState.importlib
 #include "pycore_pystate.h"
 #include "structmember.h"