diff --git a/src/add-ons/kernel/drivers/disk/virtual/fmap/fmap.c b/src/add-ons/kernel/drivers/disk/virtual/fmap/fmap.c
index 8ae37e8f44..fa2a4add75 100644
--- a/src/add-ons/kernel/drivers/disk/virtual/fmap/fmap.c
+++ b/src/add-ons/kernel/drivers/disk/virtual/fmap/fmap.c
@@ -16,6 +16,8 @@
 #define MAX_FMAPS 4
 #define DEVNAME_FMT "disk/virtual/fmap/%2d"
 
+int32 api_version = B_CUR_DRIVER_API_VERSION;
+
 status_t
 init_hardware (void)
 {
diff --git a/src/add-ons/kernel/drivers/disk/virtual/nbd/nbd.c b/src/add-ons/kernel/drivers/disk/virtual/nbd/nbd.c
index ff3a64b9cc..ed132f1963 100644
--- a/src/add-ons/kernel/drivers/disk/virtual/nbd/nbd.c
+++ b/src/add-ons/kernel/drivers/disk/virtual/nbd/nbd.c
@@ -18,7 +18,7 @@
 #include <ksocket.h>
 #include <netinet/in.h>
 
-#define DEBUG 1
+//#define DEBUG 1
 
 /* on the first open(), open ourselves for some seconds, 
  * to avoid trying to reconnect and failing on a 2nd open,
@@ -48,6 +48,8 @@
 #define benaphore_unlock UNLOCK
 #endif
 
+#define DEBUG 1
+
 #include "nbd.h"
 
 #define DRV "nbd"
@@ -736,9 +738,10 @@ device_hooks nbd_hooks={
 	NULL
 };
 
-
 #pragma mark ==== driver hooks ====
 
+int32 api_version = B_CUR_DRIVER_API_VERSION;
+
 static char *nbd_name[MAX_NBDS+1] = {
 	NULL
 };