diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index d64271ccece42a92af33f756c490692c25accc78..058f7600f79c7b71f7a10368e0b04e4343e93b99 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -21,7 +21,7 @@
 #define DRBD_MINOR_COUNT_DEF 32
 #define DRBD_MINOR_COUNT_SCALE '1'
 
-#define DRBD_VOLUME_MAX 65535
+#define DRBD_VOLUME_MAX 65534
 
 #define DRBD_DIALOG_REFRESH_MIN 0
 #define DRBD_DIALOG_REFRESH_MAX 600