diff --git a/sys/dev/ncv/ncr53c500.c b/sys/dev/ncv/ncr53c500.c
index 449bef5c0d9..6a9b638dd55 100644
--- a/sys/dev/ncv/ncr53c500.c
+++ b/sys/dev/ncv/ncr53c500.c
@@ -110,11 +110,11 @@ int ncv_data_write_bytes = 4096;
  * DEBUG
  ***************************************************/
 #ifdef	NCV_DEBUG
-int ncv_debug;
+static int ncv_debug;
 #endif	/* NCV_DEBUG */
 
 #ifdef	NCV_STATICS
-struct ncv_statics {
+static struct ncv_statics {
 	int disconnect;
 	int reselect;
 } ncv_statics;
diff --git a/sys/dev/stg/tmc18c30.c b/sys/dev/stg/tmc18c30.c
index 6ddd1510920..39dd222d3a6 100644
--- a/sys/dev/stg/tmc18c30.c
+++ b/sys/dev/stg/tmc18c30.c
@@ -116,11 +116,11 @@
  * DEBUG
  ***************************************************/
 #ifdef	STG_DEBUG
-int stg_debug;
+static int stg_debug;
 #endif	/* STG_DEBUG */
 
 #ifdef	STG_STATICS
-struct stg_statics {
+static struct stg_statics {
 	int arbit_fail_0;
 	int arbit_fail_1;
 	int disconnect;