diff --git a/Math.php b/Math.php
index ad4390b..083c477 100644
--- a/Math.php
+++ b/Math.php
@@ -496,9 +496,6 @@ $moduleTemplate = array(
 
 $wgResourceModules['ext.math.editbutton.enabler'] = array(
 	'scripts' => 'ext.math.editbutton.js',
-	'dependencies' => array(
-		'mediawiki.action.edit',
-	),
 	'messages' => array(
 		'math_tip',
 		'math_sample',
diff --git a/modules/ext.math.editbutton.js b/modules/ext.math.editbutton.js
index b5d9fbd..c2742d5 100644
--- a/modules/ext.math.editbutton.js
+++ b/modules/ext.math.editbutton.js
@@ -1,11 +1,13 @@
 ( function ( mw ) {
-	var iconPath = mw.config.get( 'wgExtensionAssetsPath' ) + '/Math/images/';
-	mw.toolbar.addButton( {
-		imageFile: iconPath + 'button_math.png',
-		speedTip: mw.msg( 'math_tip' ),
-		tagOpen: '<math>',
-		tagClose: '</math>',
-		sampleText: mw.msg( 'math_sample' ),
-		imageId: 'mw-editbutton-math'
-	} );
-} ( mediaWiki ) );
+	if ( mw.toolbar ) {
+		var iconPath = mw.config.get( 'wgExtensionAssetsPath' ) + '/Math/images/';
+		mw.toolbar.addButton( {
+			imageFile: iconPath + 'button_math.png',
+			speedTip: mw.msg( 'math_tip' ),
+			tagOpen: '<math>',
+			tagClose: '</math>',
+			sampleText: mw.msg( 'math_sample' ),
+			imageId: 'mw-editbutton-math'
+		} );
+	}
+}( mediaWiki ) );