diff --git a/language/types/string.xml b/language/types/string.xml
index a67d28a33b..ad50f463c6 100644
--- a/language/types/string.xml
+++ b/language/types/string.xml
@@ -146,6 +146,10 @@ echo 'Variables do not $expand $either';
        <entry><literal>\v</literal></entry>
        <entry>vertical tab (VT or 0x0B (11) in ASCII) (since PHP 5.2.5)</entry>
       </row>
+      <row>
+       <entry><literal>\e</literal></entry>
+       <entry>escape (ESC or 0x1B (27) in ASCII) (since PHP 5.4.0)</entry>
+      </row>
       <row>
        <entry><literal>\f</literal></entry>
        <entry>form feed (FF or 0x0C (12) in ASCII) (since PHP 5.2.5)</entry>