diff --git a/includes/class-displayfeaturedimagegenesis-common.php b/includes/class-displayfeaturedimagegenesis-common.php
index cf5512f..0f34028 100644
--- a/includes/class-displayfeaturedimagegenesis-common.php
+++ b/includes/class-displayfeaturedimagegenesis-common.php
@@ -281,13 +281,15 @@ class Display_Featured_Image_Genesis_Common {
 	 */
 	public static function get_image_id( $attachment_url = '' ) {
 
-		$attachment_id = false;
-
+		_deprecated_function( __FUNCTION__, '3.1.0' );
 		// as of 2.2.0, if a (new) image id is passed to the function, or if it's empty, return it as is.
 		if ( is_numeric( $attachment_url ) || '' === $attachment_url ) {
 			return $attachment_url;
 		}
 
+		_deprecated_function( __FUNCTION__, '3.1.0' );
+		$attachment_id = false;
+
 		// if we're running 4.0 or later, we can do this all using a new core function.
 		if ( function_exists( 'attachment_url_to_postid' ) ) {
 			$url_stripped  = preg_replace( '/-\d+x\d+(?=\.(jpg|jpeg|png|gif)$)/i', '', $attachment_url );