diff --git a/doc/f00bar-modules.5.scd b/doc/f00bar-modules.5.scd
index e8e1e80..9662c97 100644
--- a/doc/f00bar-modules.5.scd
+++ b/doc/f00bar-modules.5.scd
@@ -583,6 +583,41 @@ bar:
           string: {text: "{symbol}"}
 ```
 
+# XWINDOW
+
+This module provides the application name and window title of the
+currently focused window.
+
+Note: this module is X11 only. It does not work in Wayland. If you are
+running Sway, take a look at the _i3_ module and its _current_ tag.
+
+## TAGS
+
+[[ *Name*
+:[ *Type*
+:[ *Description*
+|  application
+:  string
+:  Name of the application that owns the currently focused window
+|  title
+:  string
+:  The title of the currently focused window
+
+## CONFIGURATION
+
+No additional attributes supported, only the generic ones (see
+*GENERIC CONFIGURATION*)
+
+## EXAMPLES
+
+```
+bar:
+  left:
+    - xwindow:
+        content:
+          string: {text: "{application}: {title}"}
+```
+
 # SEE ALSO
 
 *f00bar-particles*(5), *f00bar-tags*(5), *f00bar-decorations*(5)