diff --git a/src/backend/x11/backend.c b/src/backend/x11/backend.c
index 1e385a7..a1f9e45 100644
--- a/src/backend/x11/backend.c
+++ b/src/backend/x11/backend.c
@@ -16,7 +16,7 @@
 #include "base/macros.h"
 #include "base/memory.h"
 #include "core/types.h"
-#include "internal.h" /* IWYU pragma: keep */
+#include "internal.h"
 
 typedef struct atom_item_t {
   const char *name;
@@ -28,64 +28,9 @@ static void atoms_init(backend_t *backend) {
   xcb_connection_t *conn = backend->conn;
   atoms_t *atoms = &backend->atoms;
 
-  atom_item_t atom_list[] = {
-    {"COMPOUND_TEXT", sizeof("COMPOUND_TEXT") - 1, &atoms->COMPOUND_TEXT},
-    {"UTF8_STRING", sizeof("UTF8_STRING") - 1, &atoms->UTF8_STRING},
-
-    {"WM_WINDOW_ROLE", sizeof("WM_WINDOW_ROLE") - 1, &atoms->WM_WINDOW_ROLE},
-    {"WM_NAME", sizeof("WM_NAME") - 1, &atoms->WM_NAME},
-    {"_NET_WM_NAME", sizeof("_NET_WM_NAME") - 1, &atoms->_NET_WM_NAME},
-
-    {"_NET_WM_STATE", sizeof("_NET_WM_STATE") - 1, &atoms->_NET_WM_STATE},
-    {"_NET_WM_STATE_FULLSCREEN", sizeof("_NET_WM_STATE_FULLSCREEN") - 1,
-     &atoms->_NET_WM_STATE_FULLSCREEN},
-    {"_NET_WM_STATE_ABOVE", sizeof("_NET_WM_STATE_ABOVE") - 1,
-     &atoms->_NET_WM_STATE_ABOVE},
-    {"_NET_WM_STATE_STICKY", sizeof("_NET_WM_STATE_STICKY") - 1,
-     &atoms->_NET_WM_STATE_STICKY},
-    {"_NET_WM_STATE_MODAL", sizeof("_NET_WM_STATE_MODAL") - 1,
-     &atoms->_NET_WM_STATE_MODAL},
-    {"_NET_WM_STATE_SKIP_TASKBAR", sizeof("_NET_WM_STATE_SKIP_TASKBAR") - 1,
-     &atoms->_NET_WM_STATE_SKIP_TASKBAR},
-    {"_NET_WM_STATE_MAXIMIZED_VERT", sizeof("_NET_WM_STATE_MAXIMIZED_VERT") - 1,
-     &atoms->_NET_WM_STATE_MAXIMIZED_VERT},
-    {"_NET_WM_STATE_MAXIMIZED_HORZ", sizeof("_NET_WM_STATE_MAXIMIZED_HORZ") - 1,
-     &atoms->_NET_WM_STATE_MAXIMIZED_HORZ},
-
-    {"_NET_WM_WINDOW_TYPE", sizeof("_NET_WM_WINDOW_TYPE") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE},
-    {"_NET_WM_WINDOW_TYPE_NORMAL", sizeof("_NET_WM_WINDOW_TYPE_NORMAL") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_NORMAL},
-    {"_NET_WM_WINDOW_TYPE_DESKTOP", sizeof("_NET_WM_WINDOW_TYPE_DESKTOP") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_DESKTOP},
-    {"_NET_WM_WINDOW_TYPE_DOCK", sizeof("_NET_WM_WINDOW_TYPE_DOCK") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_DOCK},
-    {"_NET_WM_WINDOW_TYPE_TOOLBAR", sizeof("_NET_WM_WINDOW_TYPE_TOOLBAR") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_TOOLBAR},
-    {"_NET_WM_WINDOW_TYPE_DIALOG", sizeof("_NET_WM_WINDOW_TYPE_DIALOG") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_DIALOG},
-    {"_NET_WM_WINDOW_TYPE_UTILITY", sizeof("_NET_WM_WINDOW_TYPE_UTILITY") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_UTILITY},
-    {"_NET_WM_WINDOW_TYPE_SPLASH", sizeof("_NET_WM_WINDOW_TYPE_SPLASH") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_SPLASH},
-    {"_NET_WM_WINDOW_TYPE_MENU", sizeof("_NET_WM_WINDOW_TYPE_MENU") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_MENU},
-    {"_NET_WM_WINDOW_TYPE_DROPDOWN_MENU",
-     sizeof("_NET_WM_WINDOW_TYPE_DROPDOWN_MENU") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_DROPDOWN_MENU},
-    {"_NET_WM_WINDOW_TYPE_POPUP_MENU",
-     sizeof("_NET_WM_WINDOW_TYPE_POPUP_MENU") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_POPUP_MENU},
-    {"_NET_WM_WINDOW_TYPE_TOOLTIP", sizeof("_NET_WM_WINDOW_TYPE_TOOLTIP") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_TOOLTIP},
-    {"_NET_WM_WINDOW_TYPE_COMBO", sizeof("_NET_WM_WINDOW_TYPE_COMBO") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_COMBO},
-    {"_NET_WM_WINDOW_TYPE_DND", sizeof("_NET_WM_WINDOW_TYPE_DND") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_DND},
-    {"_NET_WM_WINDOW_TYPE_NOTIFICATION",
-     sizeof("_NET_WM_WINDOW_TYPE_NOTIFICATION") - 1,
-     &atoms->_NET_WM_WINDOW_TYPE_NOTIFICATION},
-  };
+#define ATOM_ITEM(name) {#name, sizeof(#name) - 1, &atoms->name},
+  atom_item_t atom_list[] = {ATOM_LIST(ATOM_ITEM)};
+#undef ATOM_ITEM
 
   xcb_intern_atom_cookie_t cookies[countof(atom_list)];
   for (size_t i = 0; i < countof(atom_list); ++i) {
diff --git a/src/backend/x11/internal.h b/src/backend/x11/internal.h
index ea28101..ff7dc37 100644
--- a/src/backend/x11/internal.h
+++ b/src/backend/x11/internal.h
@@ -3,38 +3,43 @@
 #include <xcb/xcb.h>
 #include <xcb/xproto.h>
 
-#include "core/backend.h" /* IWYU pragma: keep */
+#define ATOM_LIST(X)                   \
+  X(COMPOUND_TEXT)                     \
+  X(UTF8_STRING)                       \
+                                       \
+  X(WM_WINDOW_ROLE)                    \
+  X(WM_NAME)                           \
+  X(_NET_WM_NAME)                      \
+                                       \
+  X(_NET_WM_STATE)                     \
+  X(_NET_WM_STATE_FULLSCREEN)          \
+  X(_NET_WM_STATE_ABOVE)               \
+  X(_NET_WM_STATE_STICKY)              \
+  X(_NET_WM_STATE_MODAL)               \
+  X(_NET_WM_STATE_SKIP_TASKBAR)        \
+  X(_NET_WM_STATE_MAXIMIZED_VERT)      \
+  X(_NET_WM_STATE_MAXIMIZED_HORZ)      \
+                                       \
+  X(_NET_WM_WINDOW_TYPE)               \
+  X(_NET_WM_WINDOW_TYPE_NORMAL)        \
+  X(_NET_WM_WINDOW_TYPE_DESKTOP)       \
+  X(_NET_WM_WINDOW_TYPE_DOCK)          \
+  X(_NET_WM_WINDOW_TYPE_TOOLBAR)       \
+  X(_NET_WM_WINDOW_TYPE_DIALOG)        \
+  X(_NET_WM_WINDOW_TYPE_UTILITY)       \
+  X(_NET_WM_WINDOW_TYPE_SPLASH)        \
+  X(_NET_WM_WINDOW_TYPE_MENU)          \
+  X(_NET_WM_WINDOW_TYPE_DROPDOWN_MENU) \
+  X(_NET_WM_WINDOW_TYPE_POPUP_MENU)    \
+  X(_NET_WM_WINDOW_TYPE_TOOLTIP)       \
+  X(_NET_WM_WINDOW_TYPE_COMBO)         \
+  X(_NET_WM_WINDOW_TYPE_DND)           \
+  X(_NET_WM_WINDOW_TYPE_NOTIFICATION)
 
 typedef struct atoms_t {
-  xcb_atom_t COMPOUND_TEXT;
-  xcb_atom_t UTF8_STRING;
-  xcb_atom_t WM_WINDOW_ROLE;
-  xcb_atom_t WM_NAME;
-  xcb_atom_t _NET_WM_NAME;
-  xcb_atom_t _NET_WM_STATE;
-  xcb_atom_t _NET_WM_STATE_FULLSCREEN;
-  xcb_atom_t _NET_WM_STATE_ABOVE;
-  xcb_atom_t _NET_WM_STATE_STICKY;
-  xcb_atom_t _NET_WM_STATE_MODAL;
-  xcb_atom_t _NET_WM_STATE_SKIP_TASKBAR;
-  xcb_atom_t _NET_WM_STATE_MAXIMIZED_VERT;
-  xcb_atom_t _NET_WM_STATE_MAXIMIZED_HORZ;
-
-  xcb_atom_t _NET_WM_WINDOW_TYPE;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_NORMAL;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_DESKTOP;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_DOCK;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_TOOLBAR;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_DIALOG;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_UTILITY;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_SPLASH;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_MENU;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_DROPDOWN_MENU;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_POPUP_MENU;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_TOOLTIP;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_COMBO;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_DND;
-  xcb_atom_t _NET_WM_WINDOW_TYPE_NOTIFICATION;
+#define DECLARATION_ATOM(name) xcb_atom_t name;
+  ATOM_LIST(DECLARATION_ATOM);
+#undef DECLARATION_ATOM
 } atoms_t;
 
 struct backend_t {