diff --git a/src/add-ons/kernel/drivers/input/wacom/wacom.c b/src/add-ons/kernel/drivers/input/wacom/wacom.c
index 5cba358c6d..05efd56dea 100644
--- a/src/add-ons/kernel/drivers/input/wacom/wacom.c
+++ b/src/add-ons/kernel/drivers/input/wacom/wacom.c
@@ -18,6 +18,7 @@
 #include <OS.h>
 #include <USB3.h>
 
+int32 api_version = B_CUR_DRIVER_API_VERSION;
 
 #define DEBUG_DRIVER 0