1 files changed, 1 insertions, 0 deletions
diff --git a/video/out/vo.h b/video/out/vo.h
index f50df6c179..a05860cbc7 100644
--- a/video/out/vo.h
+++ b/video/out/vo.h
@@ -116,6 +116,7 @@ enum mp_voctrl {
     VOCTRL_GET_ICC_PROFILE,             // bstr*
     VOCTRL_GET_AMBIENT_LUX,             // int*
     VOCTRL_GET_DISPLAY_FPS,             // double*
+    VOCTRL_GET_HIDPI_SCALE,             // double*
 
     VOCTRL_GET_PREF_DEINT,              // int*