diff --git a/drivers/char/drm/radeon_drm.h b/drivers/char/drm/radeon_drm.h
index aab82e1..68b0608 100644
--- a/drivers/char/drm/radeon_drm.h
+++ b/drivers/char/drm/radeon_drm.h
@@ -669,6 +669,7 @@
 #define RADEON_PARAM_CARD_TYPE             12
 #define RADEON_PARAM_VBLANK_CRTC           13   /* VBLANK CRTC */
 #define RADEON_PARAM_FB_LOCATION           14   /* FB location */
+#define RADEON_PARAM_NUM_GB_PIPES          15   /* num GB pipes */
 
 typedef struct drm_radeon_getparam {
 	int param;