diff --git a/udevadm.8 b/udevadm.8
index c9a1178b4d0..acad283bc32 100644
--- a/udevadm.8
+++ b/udevadm.8
@@ -144,7 +144,7 @@ Watches the udev event queue, and exits if all current events are handled\.
 .PP
 \fB\-\-timeout=\fR\fB\fIseconds\fR\fR
 .RS 4
-Maximum seconds to wait for the queue to become empty\.
+Maximum number of seconds to wait for the event queue to become empty\. The default value is 180 seconds\.
 .RE
 .PP
 \fB\-\-help\fR
diff --git a/udevadm.xml b/udevadm.xml
index 5a47b734b5c..ccbeeca404c 100644
--- a/udevadm.xml
+++ b/udevadm.xml
@@ -197,7 +197,8 @@
             <varlistentry>
               <term><option>--timeout=<replaceable>seconds</replaceable></option></term>
               <listitem>
-                <para>Maximum seconds to wait for the queue to become empty.</para>
+                <para>Maximum number of seconds to wait for the event queue to become empty.
+                The default value is 180 seconds.</para>
               </listitem>
             </varlistentry>
             <varlistentry>