diff --git a/dwl.c b/dwl.c
index 227f345..40ea05a 100644
--- a/dwl.c
+++ b/dwl.c
@@ -117,7 +117,7 @@ typedef struct {
 	struct wl_listener configure;
 	struct wl_listener set_hints;
 #endif
-	int bw;
+	unsigned int bw;
 	unsigned int tags;
 	int isfloating, isurgent, isfullscreen;
 	uint32_t resize; /* configure serial of a pending resize */