diff --git a/client.c b/client.c
index 9a98c1b4..c8c85472 100644
--- a/client.c
+++ b/client.c
@@ -273,6 +273,20 @@ client_stack_below(client_t *c, xcb_window_t previous)
     return c->win;
 }
 
+/** Stacking layout layers */
+typedef enum
+{
+    LAYER_DESKTOP = 1,
+    LAYER_BELOW,
+    LAYER_TILE,
+    LAYER_FLOAT,
+    LAYER_ABOVE,
+    LAYER_FULLSCREEN,
+    LAYER_MODAL,
+    LAYER_ONTOP,
+    LAYER_OUTOFSPACE
+} layer_t;
+
 /** Get the real layer of a client according to its attribute (fullscreen, …)
  * \param c The client.
  * \return The real layer.
diff --git a/client.h b/client.h
index 9315e2f8..cb18b1fd 100644
--- a/client.h
+++ b/client.h
@@ -27,6 +27,18 @@
 #include "structs.h"
 #include "stack.h"
 
+static void
+client_delete(client_t **c)
+{
+    button_array_wipe(&(*c)->buttons);
+    p_delete(&(*c)->icon_path);
+    p_delete(&(*c)->name);
+    p_delete(c);
+}
+
+ARRAY_FUNCS(client_t *, client, DO_NOTHING)
+DO_RCNT(client_t, client, client_delete)
+
 #define client_need_arrange(c) \
     do { \
         if(!globalconf.screens[(c)->screen].need_arrange \
diff --git a/structs.h b/structs.h
index 1aa2fb42..a50cff31 100644
--- a/structs.h
+++ b/structs.h
@@ -35,20 +35,6 @@
 #include "common/xembed.h"
 #include "common/refcount.h"
 
-/** Stacking layout layers */
-typedef enum
-{
-    LAYER_DESKTOP = 1,
-    LAYER_BELOW,
-    LAYER_TILE,
-    LAYER_FLOAT,
-    LAYER_ABOVE,
-    LAYER_FULLSCREEN,
-    LAYER_MODAL,
-    LAYER_ONTOP,
-    LAYER_OUTOFSPACE
-} layer_t;
-
 /** Windows type */
 typedef enum
 {
@@ -78,7 +64,7 @@ typedef struct widget_t widget_t;
 typedef struct widget_node_t widget_node_t;
 typedef struct client_t client_t;
 typedef struct client_node_t client_node_t;
-typedef struct _tag_t tag_t;
+typedef struct tag tag_t;
 typedef struct tag_client_node_t tag_client_node_t;
 typedef widget_t *(widget_constructor_t)(alignment_t);
 typedef void (widget_destructor_t)(widget_t *);
@@ -129,7 +115,6 @@ struct button_t
     /** Lua function to execute on release. */
     luaA_ref release;
 };
-
 DO_RCNT(button_t, button, p_delete)
 DO_ARRAY(button_t *, button, button_unref)
 
@@ -166,29 +151,6 @@ struct widget_t
     bool isvisible;
 };
 
-/** Delete a widget structure.
- * \param widget The widget to destroy.
- */
-static inline void
-widget_delete(widget_t **widget)
-{
-    if((*widget)->destructor)
-        (*widget)->destructor(*widget);
-    button_array_wipe(&(*widget)->buttons);
-    p_delete(&(*widget)->name);
-    p_delete(widget);
-}
-
-DO_RCNT(widget_t, widget, widget_delete)
-
-struct widget_node_t
-{
-    /** The widget */
-    widget_t *widget;
-    /** The area where the widget was drawn */
-    area_t area;
-};
-
 /* Strut */
 typedef struct
 {
@@ -273,18 +235,7 @@ struct client_t
     /** Next and previous clients */
     client_t *prev, *next;
 };
-
-static void
-client_delete(client_t **c)
-{
-    button_array_wipe(&(*c)->buttons);
-    p_delete(&(*c)->icon_path);
-    p_delete(&(*c)->name);
-    p_delete(c);
-}
-
-DO_ARRAY(client_t *, client, DO_NOTHING)
-DO_RCNT(client_t, client, client_delete)
+ARRAY_TYPE(client_t *, client)
 
 struct client_node_t
 {
@@ -295,7 +246,7 @@ struct client_node_t
 };
 
 /** Tag type */
-struct _tag_t
+struct tag
 {
     /** Ref count */
     int refcount;
diff --git a/tag.h b/tag.h
index 7e39ef4d..4f04c085 100644
--- a/tag.h
+++ b/tag.h
@@ -23,6 +23,7 @@
 #define AWESOME_TAG_H
 
 #include "structs.h"
+#include "client.h"
 #include "common/refcount.h"
 
 /** Check if a client is tiled */
diff --git a/widget.h b/widget.h
index 0d1d03c0..966c9143 100644
--- a/widget.h
+++ b/widget.h
@@ -26,6 +26,29 @@
 
 #define WIDGET_CACHE_EMBEDDED       (1<<3)
 
+struct widget_node_t
+{
+    /** The widget */
+    widget_t *widget;
+    /** The area where the widget was drawn */
+    area_t area;
+};
+
+/** Delete a widget structure.
+ * \param widget The widget to destroy.
+ */
+static inline void
+widget_delete(widget_t **widget)
+{
+    if((*widget)->destructor)
+        (*widget)->destructor(*widget);
+    button_array_wipe(&(*widget)->buttons);
+    p_delete(&(*widget)->name);
+    p_delete(widget);
+}
+
+DO_RCNT(widget_t, widget, widget_delete)
+
 void widget_invalidate_cache(int, int);
 int widget_calculate_offset(int, int, int, int);
 void widget_common_new(widget_t *);