diff --git a/cogl/cogl-context.h b/cogl/cogl-context.h
index 43220fde0..791d2d3dd 100644
--- a/cogl/cogl-context.h
+++ b/cogl/cogl-context.h
@@ -238,6 +238,7 @@ typedef enum _CoglFeatureID
   COGL_FEATURE_ID_GLES2_CONTEXT,
   COGL_FEATURE_ID_DEPTH_TEXTURE,
 
+  /*< private >*/
   _COGL_N_FEATURE_IDS   /*< skip >*/
 } CoglFeatureID;