1 files changed, 1 insertions, 0 deletions
diff --git a/video/out/opengl/context.h b/video/out/opengl/context.h
index 505c51168a..d0588ddbd9 100644
--- a/video/out/opengl/context.h
+++ b/video/out/opengl/context.h
@@ -33,6 +33,7 @@ enum {
     VOFLAG_ALPHA        = 1 << 3,       // Hint to request alpha framebuffer
     VOFLAG_SW           = 1 << 4,       // Hint to accept a software GL renderer
     VOFLAG_ANGLE_DCOMP  = 1 << 5,       // Whether DirectComposition is allowed
+    VOFLAG_PROBING      = 1 << 6,       // The backend is being auto-probed.
 };
 
 extern const int mpgl_preferred_gl_versions[];