Index: branches/5.2.x/core/admin_templates/config/custom_variables.tpl
===================================================================
diff -u -N -r15608 -r16770
--- branches/5.2.x/core/admin_templates/config/custom_variables.tpl	(.../custom_variables.tpl)	(revision 15608)
+++ branches/5.2.x/core/admin_templates/config/custom_variables.tpl	(.../custom_variables.tpl)	(revision 16770)
@@ -143,4 +143,8 @@
 
 <inp2:m_DefineElement name="cf_AllowAdminConsoleInterfaceChange_value">
 	<inp2:m_RenderElement name="cf_default_value" pass_params="1"/> <label for="_cb_<inp2:InputName name='VariableValue'/>"><inp2:m_Phrase name="la_AllowChangingAdminConsoleInterface"/></label>
-</inp2:m_DefineElement>
\ No newline at end of file
+</inp2:m_DefineElement>
+
+<inp2:m_DefineElement name="cf_SemaphoreLifetimeInSeconds_value">
+	<inp2:m_RenderElement name="cf_default_value" pass_params="1"/> <inp2:m_Phrase name="la_text_seconds"/>
+</inp2:m_DefineElement>