diff --git a/gtk/gtkcellrendereraccel.h b/gtk/gtkcellrendereraccel.h
index 4e4cd8dfff..6d7b42007b 100644
--- a/gtk/gtkcellrendereraccel.h
+++ b/gtk/gtkcellrendereraccel.h
@@ -37,7 +37,16 @@ typedef struct _GtkCellRendererAccel              GtkCellRendererAccel;
 typedef struct _GtkCellRendererAccelPrivate       GtkCellRendererAccelPrivate;
 typedef struct _GtkCellRendererAccelClass         GtkCellRendererAccelClass;
 
-
+/**
+ * GtkCellRendererAccelMode:
+ * @GTK_CELL_RENDERER_ACCEL_MODE_GTK: GTK+ accelerators mode
+ * @GTK_CELL_RENDERER_ACCEL_MODE_OTHER: Other accelerator mode
+ *
+ * Determines if the edited accelerators are GTK+ accelerators. If
+ * they are, consumed modifiers are suppressed, only accelerators
+ * accepted by GTK+ are allowed, and the accelerators are rendered
+ * in the same way as they are in menus.
+ */
 typedef enum
 {
   GTK_CELL_RENDERER_ACCEL_MODE_GTK,