diff --git a/include/i3.h b/include/i3.h
index 7bbab415..ccf7a495 100644
--- a/include/i3.h
+++ b/include/i3.h
@@ -3,7 +3,7 @@
  *
  * i3 - an improved dynamic tiling window manager
  *
- * (c) 2009 Michael Stapelberg and contributors
+ * © 2009 Michael Stapelberg and contributors
  *
  * See file LICENSE for license information.
  *
@@ -20,7 +20,7 @@
 #ifndef _I3_H
 #define _I3_H
 
-#define NUM_ATOMS 14
+#define NUM_ATOMS 17
 
 extern char **start_argv;
 extern Display *xkbdpy;
diff --git a/include/xcb.h b/include/xcb.h
index 7f89caaf..a8a75876 100644
--- a/include/xcb.h
+++ b/include/xcb.h
@@ -50,6 +50,9 @@ enum { _NET_SUPPORTED = 0,
         _NET_WM_WINDOW_TYPE,
         _NET_WM_WINDOW_TYPE_DOCK,
         _NET_WM_WINDOW_TYPE_DIALOG,
+        _NET_WM_WINDOW_TYPE_UTILITY,
+        _NET_WM_WINDOW_TYPE_TOOLBAR,
+        _NET_WM_WINDOW_TYPE_SPLASH,
         _NET_WM_DESKTOP,
         _NET_WM_STRUT_PARTIAL,
         WM_PROTOCOLS,
diff --git a/src/commands.c b/src/commands.c
index 274f0e27..10ac35f8 100644
--- a/src/commands.c
+++ b/src/commands.c
@@ -924,7 +924,7 @@ void parse_command(xcb_connection_t *conn, const char *command) {
         }
 
         if (last_focused == NULL) {
-                LOG("Not performing (null) \n");
+                LOG("Not performing (no window found)\n");
                 return;
         }
 
diff --git a/src/mainx.c b/src/mainx.c
index 67ab25fd..ca1bc8ad 100644
--- a/src/mainx.c
+++ b/src/mainx.c
@@ -161,6 +161,9 @@ int main(int argc, char *argv[], char *env[]) {
         REQUEST_ATOM(_NET_WM_DESKTOP);
         REQUEST_ATOM(_NET_WM_WINDOW_TYPE_DOCK);
         REQUEST_ATOM(_NET_WM_WINDOW_TYPE_DIALOG);
+        REQUEST_ATOM(_NET_WM_WINDOW_TYPE_UTILITY);
+        REQUEST_ATOM(_NET_WM_WINDOW_TYPE_TOOLBAR);
+        REQUEST_ATOM(_NET_WM_WINDOW_TYPE_SPLASH);
         REQUEST_ATOM(_NET_WM_STRUT_PARTIAL);
         REQUEST_ATOM(WM_PROTOCOLS);
         REQUEST_ATOM(WM_DELETE_WINDOW);
@@ -265,6 +268,9 @@ int main(int argc, char *argv[], char *env[]) {
         GET_ATOM(_NET_WM_DESKTOP);
         GET_ATOM(_NET_WM_WINDOW_TYPE_DOCK);
         GET_ATOM(_NET_WM_WINDOW_TYPE_DIALOG);
+        GET_ATOM(_NET_WM_WINDOW_TYPE_UTILITY);
+        GET_ATOM(_NET_WM_WINDOW_TYPE_TOOLBAR);
+        GET_ATOM(_NET_WM_WINDOW_TYPE_SPLASH);
         GET_ATOM(_NET_WM_STRUT_PARTIAL);
         GET_ATOM(WM_PROTOCOLS);
         GET_ATOM(WM_DELETE_WINDOW);
diff --git a/src/manage.c b/src/manage.c
index 72c7bce1..1f79cb94 100644
--- a/src/manage.c
+++ b/src/manage.c
@@ -259,7 +259,10 @@ void reparent_window(xcb_connection_t *conn, xcb_window_t child,
                                 SLIST_INSERT_HEAD(&(c_ws->screen->dock_clients), new, dock_clients);
                                 /* If it’s a dock we can’t make it float, so we break */
                                 break;
-                        } else if (atom[i] == atoms[_NET_WM_WINDOW_TYPE_DIALOG]) {
+                        } else if (atom[i] == atoms[_NET_WM_WINDOW_TYPE_DIALOG] ||
+                                   atom[i] == atoms[_NET_WM_WINDOW_TYPE_UTILITY] ||
+                                   atom[i] == atoms[_NET_WM_WINDOW_TYPE_TOOLBAR] ||
+                                   atom[i] == atoms[_NET_WM_WINDOW_TYPE_SPLASH]) {
                                 /* Set the dialog window to automatically floating, will be used below */
                                 new->floating = FLOATING_AUTO_ON;
                                 LOG("dialog window, automatically floating\n");