diff --git a/CHANGES.md b/CHANGES.md
index 3af572b7f5d..442fe8a0a12 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -13,6 +13,7 @@ Fixed Issues:
 * [#12489](http://dev.ckeditor.com/ticket/12423) and [#12491](http://dev.ckeditor.com/ticket/12423): Fixed: Various issues related to restoring selection after making operations on filler char. See the [fixed cases](http://dev.ckeditor.com/ticket/12491#comment:4).
 * [#11647](http://dev.ckeditor.com/ticket/11647): Fixed: The [`editor.blur`](http://docs.ckeditor.com/#!/api/CKEDITOR.editor-event-blur) event is not fired on first blur after initializing the inline editor on already focused element.
 * [#12601](http://dev.ckeditor.com/ticket/12601): Fixed: [Strikethrough](http://ckeditor.com/addon/basicstyles) button tooltip spelling.
+* [#12546](http://dev.ckeditor.com/ticket/12546): Fixed: Preview tab in docprops dialog is always disabled.
 
 ## CKEditor 4.4.5
 
diff --git a/plugins/docprops/dialogs/docprops.js b/plugins/docprops/dialogs/docprops.js
index b36fe4944aa..274e0f53ffe 100644
--- a/plugins/docprops/dialogs/docprops.js
+++ b/plugins/docprops/dialogs/docprops.js
@@ -583,14 +583,15 @@ CKEDITOR.dialog.add( 'docProps', function( editor ) {
 				{
 				type: 'html',
 				id: 'previewHtml',
-				html: '<iframe src="' + previewSrc + '" style="width: 100%; height: 310px" hidefocus="true" frameborder="0" ' +
-					'id="cke_docProps_preview_iframe"></iframe>',
+				html: '<iframe src="' + previewSrc + '" style="width: 100%; height: 310px" hidefocus="true" frameborder="0"></iframe>',
 				onLoad: function() {
+					var iframe = this.getElement();
+
 					this.getDialog().on( 'selectPage', function( ev ) {
 						if ( ev.data.page == 'preview' ) {
 							var self = this;
 							setTimeout( function() {
-								var doc = CKEDITOR.document.getById( 'cke_docProps_preview_iframe' ).getFrameDocument(),
+								var doc = iframe.getFrameDocument(),
 									html = doc.getElementsByTag( 'html' ).getItem( 0 ),
 									head = doc.getHead(),
 									body = doc.getBody();
@@ -598,7 +599,7 @@ CKEDITOR.dialog.add( 'docProps', function( editor ) {
 							}, 50 );
 						}
 					} );
-					CKEDITOR.document.getById( 'cke_docProps_preview_iframe' ).getAscendant( 'table' ).setStyle( 'height', '100%' );
+					iframe.getAscendant( 'table' ).setStyle( 'height', '100%' );
 				}
 			}
 			]
diff --git a/tests/plugins/docprops/docprops.js b/tests/plugins/docprops/docprops.js
index a952d991624..95989b64c7a 100644
--- a/tests/plugins/docprops/docprops.js
+++ b/tests/plugins/docprops/docprops.js
@@ -39,5 +39,18 @@ bender.test( {
 		} );
 
 		tc.wait();
+	},
+
+	// #12546
+	'test preview tab is available': function() {
+		var bot = this.editorBot;
+
+		bot.dialog( 'docProps', function( dialog ) {
+			var tabs = dialog.parts.tabs.getChildren();
+
+			assert.isTrue( !tabs.getItem( 3 ).hasClass( 'cke_dialog_tab_disabled' ), 'Tab preview should be enabled.' );
+
+			dialog.getButton( 'ok' ).click();
+		} );
 	}
 } );
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