diff --git a/UniversalLanguageSelector.hooks.php b/UniversalLanguageSelector.hooks.php
index 4c7a5534..5724deb2 100644
--- a/UniversalLanguageSelector.hooks.php
+++ b/UniversalLanguageSelector.hooks.php
@@ -19,6 +19,11 @@
  */
 
 class UniversalLanguageSelectorHooks {
+	// Used when extension registration in use which skips the main php file
+	public static function setVersionConstant() {
+		define( 'ULS_VERSION', '2015-06-08' );
+	}
+
 	/**
 	 * Whether ULS user toolbar (language selection and settings) is enabled.
 	 *
diff --git a/extension.json b/extension.json
index 5ef3b119..76250154 100644
--- a/extension.json
+++ b/extension.json
@@ -88,6 +88,7 @@
 		"@ULSCompactLinks": "Whether the \"Compact language links\" Beta Feature is exposed. Requires $wgULSPosition to be \"interlanguage\". Defaults to false. @since 2014.03",
 		"ULSCompactLinks": false
 	},
+	"callback": "UniversalLanguageSelectorHooks::setVersionConstant",
 	"ResourceModules": {
 		"ext.uls.languagenames": {
 			"class": "ResourceLoaderULSModule"