diff --git a/gdk/gdkpipeiostream.c b/gdk/gdkpipeiostream.c
index 6dabda9de7..57a9c087cf 100644
--- a/gdk/gdkpipeiostream.c
+++ b/gdk/gdkpipeiostream.c
@@ -40,7 +40,7 @@ struct _GdkIOPipe
   GCond cond;
   guchar *buffer;
   gsize size;
-  GdkIOPipeState state : 2;
+  guint state : 2; /* GdkIOPipeState */
   guint input_closed : 1;
   guint output_closed : 1;
 };
diff --git a/gtk/gtkmenutrackeritem.c b/gtk/gtkmenutrackeritem.c
index 141c1ca0d6..7478bcf0d4 100644
--- a/gtk/gtkmenutrackeritem.c
+++ b/gtk/gtkmenutrackeritem.c
@@ -86,7 +86,7 @@ struct _GtkMenuTrackerItem
   char *action_namespace;
   char *action_and_target;
   GMenuItem *item;
-  GtkMenuTrackerItemRole role : 4;
+  guint role : 4; /* GtkMenuTrackerItemRole */
   guint is_separator : 1;
   guint can_activate : 1;
   guint sensitive : 1;
diff --git a/gtk/gtksizerequestcacheprivate.h b/gtk/gtksizerequestcacheprivate.h
index cc85dcd974..fa9173975b 100644
--- a/gtk/gtksizerequestcacheprivate.h
+++ b/gtk/gtksizerequestcacheprivate.h
@@ -70,7 +70,7 @@ typedef struct {
   CachedSizeX  cached_size_x;
   CachedSizeY  cached_size_y;
 
-  GtkSizeRequestMode request_mode   : 3;
+  guint       request_mode          : 3; /* GtkSizeRequestMode */
   guint       request_mode_valid    : 1;
   struct {
     guint       n_cached_requests   : 15;