diff --git a/src/gallium/winsys/drm/sw/sw_drm_api.c b/src/gallium/winsys/drm/sw/sw_drm_api.c
index 9c5933c73af..0fd2163913e 100644
--- a/src/gallium/winsys/drm/sw/sw_drm_api.c
+++ b/src/gallium/winsys/drm/sw/sw_drm_api.c
@@ -40,6 +40,7 @@ struct sw_drm_api
 {
    struct drm_api base;
    struct drm_api *api;
+   struct sw_winsys *sw;
 };
 
 static INLINE struct sw_drm_api *