diff --git a/doc/en/Gtk/Timeout.xml b/doc/en/Gtk/Timeout.xml
index f30ec990c..9fa5770ab 100644
--- a/doc/en/Gtk/Timeout.xml
+++ b/doc/en/Gtk/Timeout.xml
@@ -35,7 +35,12 @@
         <param name="interval">a <see cref="T:System.UInt32" /></param>
         <param name="function">a <see cref="T:Gtk.Function" /></param>
         <returns>a <see cref="T:System.UInt32" /></returns>
-        <remarks>The <paramref name="function" /> will be called repeatedly after <paramref name="interval" /> milliseconds until it returns <see langword="false" /> at which point the <see cref="T:Gtk.Timeout" /> is destroyed and will not be called again.</remarks>
+        <remarks>The <paramref name="function" /> will be called repeatedly after <paramref name="interval" /> milliseconds until it returns <see langword="false" /> at which point the <see cref="T:Gtk.Timeout" /> is destroyed and will not be called again.
+<block subset="none" type="note">
+            <para>
+	The first execution of the callback <paramref name="function" /> will only occur after the <paramref name="interval" /> has elapsed. In other words, it won't be executed right away after calling <see cref="T:Gtk.Timeout.Add" />.
+  </para>
+          </block></remarks>
       </Docs>
     </Member>
     <Member MemberName="AddFull">