diff --git a/src/mango.c b/src/mango.c
index c1866884..ac8e9789 100644
--- a/src/mango.c
+++ b/src/mango.c
@@ -469,7 +469,7 @@ typedef struct {
 	struct wl_listener key;
 	struct wl_listener destroy;
 
-	u_int32_t layout_index;
+	uint32_t layout_index;
 } KeyboardGroup;
 
 typedef struct {