diff --git a/classes/Visualizer/Module.php b/classes/Visualizer/Module.php
index 77fd5af5..c9ad1f2d 100644
--- a/classes/Visualizer/Module.php
+++ b/classes/Visualizer/Module.php
@@ -67,7 +67,7 @@ public function __construct( Visualizer_Plugin $plugin ) {
 		$this->_addFilter( Visualizer_Plugin::FILTER_UNDO_REVISIONS, 'undoRevisions', 10, 2 );
 		$this->_addFilter( Visualizer_Plugin::FILTER_HANDLE_REVISIONS, 'handleExistingRevisions', 10, 2 );
 		$this->_addFilter( Visualizer_Plugin::FILTER_GET_CHART_DATA_AS, 'getDataAs', 10, 3 );
-		$this->_addFilter( Visualizer_Plugin::FILTER_CHART_TITLE, 'filterChartTitle', 10, 2 );
+		$this->_addAction( 'pre_get_posts', 'PreGetPosts' );
 		register_shutdown_function( array($this, 'onShutdown') );
 
 	}
@@ -793,6 +793,21 @@ public function _getImage( $chart = null ) {
 		);
 	}
 
+	/**
+	 * Filter chart title if visualizer post type.
+	 *
+	 * @param object $query WP Query object.
+	 * @return void
+	 */
+	public function PreGetPosts( $query ) {
+		if ( ! $query->is_main_query() ) {
+			$post_type = $query->get( 'post_type' );
+			if ( 'visualizer' === $post_type ) {
+				$this->_addFilter( Visualizer_Plugin::FILTER_CHART_TITLE, 'filterChartTitle', 10, 2 );
+			}
+		}
+	}
+
 	/**
 	 * Filter chart title.
 	 *