diff --git a/Objects/complexobject.c b/Objects/complexobject.c
index 138ba80..08c8c89 100644
--- a/Objects/complexobject.c
+++ b/Objects/complexobject.c
@@ -829,7 +829,7 @@
 	Py_complex cr, ci;
 	int own_r = 0;
 	static PyObject *complexstr;
-	static char *kwlist[] = {"real", "imag", 0};
+	static const char *kwlist[] = {"real", "imag", 0};
 
 	r = Py_False;
 	i = NULL;