diff --git a/reference/datetime/datetime/settime.xml b/reference/datetime/datetime/settime.xml
index 3ee392fd9a..04b982ee37 100644
--- a/reference/datetime/datetime/settime.xml
+++ b/reference/datetime/datetime/settime.xml
@@ -16,6 +16,7 @@
    <methodparam><type>int</type><parameter>hour</parameter></methodparam>
    <methodparam><type>int</type><parameter>minute</parameter></methodparam>
    <methodparam choice="opt"><type>int</type><parameter>second</parameter><initializer>0</initializer></methodparam>
+   <methodparam choice="opt"><type>int</type><parameter>microseconds</parameter><initializer>0</initializer></methodparam>
   </methodsynopsis>
   <para>&style.procedural;</para>
   <methodsynopsis role="procedural">
@@ -24,6 +25,7 @@
    <methodparam><type>int</type><parameter>hour</parameter></methodparam>
    <methodparam><type>int</type><parameter>minute</parameter></methodparam>
    <methodparam choice="opt"><type>int</type><parameter>second</parameter><initializer>0</initializer></methodparam>
+   <methodparam choice="opt"><type>int</type><parameter>microseconds</parameter><initializer>0</initializer></methodparam>
   </methodsynopsis>
   <para>
    Resets the current time of the DateTime object to a different time.
@@ -58,6 +60,14 @@
      </para>
     </listitem>
    </varlistentry>
+   <varlistentry>
+    <term><parameter>microseconds</parameter></term>
+    <listitem>
+     <para>
+      Microsecond of the time.
+     </para>
+    </listitem>
+   </varlistentry>
   </variablelist>
  </refsect1>
 
diff --git a/reference/datetime/datetimeimmutable/settime.xml b/reference/datetime/datetimeimmutable/settime.xml
index 278a57c597..99ed528b69 100644
--- a/reference/datetime/datetimeimmutable/settime.xml
+++ b/reference/datetime/datetimeimmutable/settime.xml
@@ -14,6 +14,7 @@
    <methodparam><type>int</type><parameter>hour</parameter></methodparam>
    <methodparam><type>int</type><parameter>minute</parameter></methodparam>
    <methodparam choice="opt"><type>int</type><parameter>second</parameter><initializer>0</initializer></methodparam>
+   <methodparam choice="opt"><type>int</type><parameter>microseconds</parameter><initializer>0</initializer></methodparam>
   </methodsynopsis>
   <para>
    Like <methodname>DateTime::setTime</methodname> but works with