diff --git a/qtest.c b/qtest.c
index 05cefd2800..8e10340c7e 100644
--- a/qtest.c
+++ b/qtest.c
@@ -657,6 +657,7 @@ void qtest_init(const char *qtest_chrdev, const char *qtest_log, Error **errp)
 
     inbuf = g_string_new("");
     qtest_chr = chr;
+    page_size_init();
 }
 
 bool qtest_driver(void)