diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index ebbd861ef0bc..3ab41571f511 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -479,7 +479,9 @@ struct drm_amdgpu_userq_signal {
 	 * @num_syncobj_handles: A count that represents the number of syncobj handles in
 	 * @syncobj_handles.
 	 */
-	__u64	num_syncobj_handles;
+	__u16	num_syncobj_handles;
+	__u16	pad0;
+	__u32	pad1;
 	/**
 	 * @bo_read_handles: The list of BO handles that the submitted user queue job
 	 * is using for read only. This will update BO fences in the kernel.