diff --git a/cogl/cogl-onscreen.h b/cogl/cogl-onscreen.h
index 17778b76c..62999f351 100644
--- a/cogl/cogl-onscreen.h
+++ b/cogl/cogl-onscreen.h
@@ -43,7 +43,7 @@ typedef struct _CoglOnscreen CoglOnscreen;
 #define COGL_ONSCREEN(X) ((CoglOnscreen *)(X))
 
 /**
- * cogl_onscreen_new:
+ * cogl_onscreen_new: (constructor)
  * @context: A #CoglContext
  * @width: The desired framebuffer width
  * @height: The desired framebuffer height