diff --git a/CHANGES.md b/CHANGES.md
index 0aed7289c23..d38e9bac89a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -8,6 +8,7 @@ Fixed Issues:
 * [#13118](http://dev.ckeditor.com/ticket/13118): Fixed: The [`editor.getSelectedHtml()`](http://docs.ckeditor.com/#!/api/CKEDITOR.editor-method-getSelectedHtml) method throws error when called in the source mode.
 * Toolbar configurators:
   * [#13185](http://dev.ckeditor.com/ticket/13185): Fixed: Wrong position of the suggestion box if there is not enough space below the caret.
+  * [#13138](http://dev.ckeditor.com/ticket/13138): Fixed: The "Toggle empty elements" button label is unclear.
 
 ## CKEditor 4.5 Beta
 
diff --git a/samples/toolbarconfigurator/js/abstracttoolbarmodifier.js b/samples/toolbarconfigurator/js/abstracttoolbarmodifier.js
index 81bf44011aa..87e882debc3 100644
--- a/samples/toolbarconfigurator/js/abstracttoolbarmodifier.js
+++ b/samples/toolbarconfigurator/js/abstracttoolbarmodifier.js
@@ -404,13 +404,14 @@ if ( !Object.keys ) {
 	 * @private
 	 */
 	AbstractToolbarModifier.prototype._createToolbarBtn = function( cfg ) {
-		var btn = ToolbarConfigurator.FullToolbarEditor.createButton( cfg.text, cfg.cssClass );
+		var btnText = ( typeof cfg.text === 'string' ? cfg.text : cfg.text.inactive ),
+			btn = ToolbarConfigurator.FullToolbarEditor.createButton( btnText, cfg.cssClass );
 
 		this.toolbarContainer.append( btn );
 		btn.data( 'group', cfg.group );
 		btn.addClass( cfg.position );
 		btn.on( 'click', function() {
-			cfg.clickCallback.call( this, btn );
+			cfg.clickCallback.call( this, btn, cfg );
 		}, this );
 
 		return btn;
diff --git a/samples/toolbarconfigurator/js/toolbarmodifier.js b/samples/toolbarconfigurator/js/toolbarmodifier.js
index b6af552a32b..f96b4ac55db 100644
--- a/samples/toolbarconfigurator/js/toolbarmodifier.js
+++ b/samples/toolbarconfigurator/js/toolbarmodifier.js
@@ -25,15 +25,25 @@
 
 		this.toolbarButtons = [
 			{
-				text: 'Toggle visibility of empty elements',
+				text: {
+					active: 'Hide empty toolbar groups',
+					inactive: 'Show empty toolbar groups'
+				},
 				group: 'edit',
 				position: 'left',
 				cssClass: 'button-a-soft',
-				clickCallback: function( button ) {
+				clickCallback: function( button, buttonDefinition ) {
 					var className = 'button-a-background';
 
 					button[ button.hasClass( className ) ? 'removeClass' : 'addClass' ]( className );
+
 					this._toggleVisibilityEmptyElements();
+
+					if ( this.emptyVisible ) {
+						button.setText( buttonDefinition.text.active );
+					} else {
+						button.setText( buttonDefinition.text.inactive );
+					}
 				}
 			},
 			{