diff --git a/drmhwcgralloc.h b/drmhwcgralloc.h
index daa44dc..abfd2c1 100644
--- a/drmhwcgralloc.h
+++ b/drmhwcgralloc.h
@@ -23,7 +23,8 @@
 typedef struct hwc_drm_bo {
   uint32_t width;
   uint32_t height;
-  uint32_t format; /* DRM_FORMAT_* from drm_fourcc.h */
+  uint32_t format;     /* DRM_FORMAT_* from drm_fourcc.h */
+  uint32_t hal_format; /* HAL_PIXEL_FORMAT_* */
   uint32_t usage;
   uint32_t pitches[HWC_DRM_BO_MAX_PLANES];
   uint32_t offsets[HWC_DRM_BO_MAX_PLANES];