diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
index 3c7b097c4e3d..16f2eb4b65ee 100644
--- a/include/uapi/drm/msm_drm.h
+++ b/include/uapi/drm/msm_drm.h
@@ -180,7 +180,11 @@ struct drm_msm_gem_cpu_fini {
  */
 struct drm_msm_gem_submit_reloc {
 	__u32 submit_offset;  /* in, offset from submit_bo */
+#ifdef __cplusplus
+	__u32 _or;            /* in, value OR'd with result */
+#else
 	__u32 or;             /* in, value OR'd with result */
+#endif
 	__s32 shift;          /* in, amount of left shift (can be negative) */
 	__u32 reloc_idx;      /* in, index of reloc_bo buffer */
 	__u64 reloc_offset;   /* in, offset from start of reloc_bo */