diff --git a/sys/dev/cxgb/cxgb_osdep.h b/sys/dev/cxgb/cxgb_osdep.h
index b9ca32fe5ced..9aef0a3acba2 100644
--- a/sys/dev/cxgb/cxgb_osdep.h
+++ b/sys/dev/cxgb/cxgb_osdep.h
@@ -169,7 +169,7 @@ static const int debug_flags = DBG_RX;
 #define test_and_clear_bit(bit, p) atomic_cmpset_int((p), ((*(p)) | (1<<bit)), ((*(p)) & ~(1<<bit)))
 
 #define max_t(type, a, b) (type)max((a), (b))
-#define cpu_to_be32            htobe32
+#define cpu_to_be32(x)		htobe32(x)
 
 /* Standard PHY definitions */
 #define BMCR_LOOPBACK		BMCR_LOOP