diff --git a/test/xtest.c b/test/xtest.c
index fc5e43368..d7e6620e6 100644
--- a/test/xtest.c
+++ b/test/xtest.c
@@ -61,7 +61,7 @@ xtest_init_devices(void)
 {
     ScreenRec screen = {0};
     ClientRec server_client = {0};
-    WindowRec root = {0};
+    WindowRec root = {{0}};
     WindowOptRec optional = {0};
 
     /* random stuff that needs initialization */