diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/ConnectionOptions.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/ConnectionOptions.php
index c03171eb66fff..304ba7801b5e0 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/ConnectionOptions.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/ConnectionOptions.php
@@ -38,6 +38,7 @@ final class ConnectionOptions
     const ERROR_STRING = 0x32;
     const MATCHED_DN = 0x33;
     const DEBUG_LEVEL = 0x5001;
+    const TIMEOUT = 0x5002;
     const NETWORK_TIMEOUT = 0x5005;
     const X_SASL_MECH = 0x6100;
     const X_SASL_REALM = 0x6101;
diff --git a/src/Symfony/Component/Ldap/CHANGELOG.md b/src/Symfony/Component/Ldap/CHANGELOG.md
index b3f367d9ef445..7dc0c81b3dfda 100644
--- a/src/Symfony/Component/Ldap/CHANGELOG.md
+++ b/src/Symfony/Component/Ldap/CHANGELOG.md
@@ -5,6 +5,7 @@ CHANGELOG
 -----
 
  * added `EntryManager::applyOperations`
+ * Added timeout option to `ConnectionOptions`
 
 4.1.0
 -----