diff --git a/reference/strings/functions/ltrim.xml b/reference/strings/functions/ltrim.xml
index fc848976e6..6a3f35dbbf 100644
--- a/reference/strings/functions/ltrim.xml
+++ b/reference/strings/functions/ltrim.xml
@@ -85,8 +85,8 @@
      </simpara>
     </listitem>
     <listitem>
-     <simpara> <!-- not \v, since not supported by PHP -->
-      "\x0B" (<acronym>ASCII</acronym> <literal>11</literal>
+     <simpara>
+      "\v" (<acronym>ASCII</acronym> <literal>11</literal>
       (<literal>0x0B</literal>)), a vertical tab.
      </simpara>
     </listitem>
diff --git a/reference/strings/functions/rtrim.xml b/reference/strings/functions/rtrim.xml
index 896d1ae03b..380c521304 100644
--- a/reference/strings/functions/rtrim.xml
+++ b/reference/strings/functions/rtrim.xml
@@ -53,8 +53,8 @@
      </simpara>
     </listitem>
     <listitem>
-     <simpara> <!-- not \v, since not supported by PHP -->
-      "\x0B" (<acronym>ASCII</acronym> <literal>11</literal>
+     <simpara>
+      "\v" (<acronym>ASCII</acronym> <literal>11</literal>
       (<literal>0x0B</literal>)), a vertical tab.
      </simpara>
     </listitem>
diff --git a/reference/strings/functions/trim.xml b/reference/strings/functions/trim.xml
index 0dd9e66915..8833a50aca 100644
--- a/reference/strings/functions/trim.xml
+++ b/reference/strings/functions/trim.xml
@@ -52,8 +52,8 @@
      </simpara>
     </listitem>
     <listitem>
-     <simpara> <!-- not \v, since not supported by PHP -->
-      "\x0B" (<acronym>ASCII</acronym> <literal>11</literal> 
+     <simpara>
+      "\v" (<acronym>ASCII</acronym> <literal>11</literal> 
       (<literal>0x0B</literal>)), a vertical tab.
      </simpara>
     </listitem>