diff --git a/src/adapter.c b/src/adapter.c
index c952a18..754966e 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -99,6 +99,8 @@ static GSList *adapters = NULL;
 static int default_adapter_id = -1;
 
 static struct mgmt *mgmt_master = NULL;
+
+#define MGMT_VERSION(v, r) ((v << 16) + (r))
 static uint8_t mgmt_version = 0;
 static uint8_t mgmt_revision = 0;