diff --git a/includes/class-displayfeaturedimagegenesis-output.php b/includes/class-displayfeaturedimagegenesis-output.php
index 143f455..106eaf6 100644
--- a/includes/class-displayfeaturedimagegenesis-output.php
+++ b/includes/class-displayfeaturedimagegenesis-output.php
@@ -106,7 +106,7 @@ class Display_Featured_Image_Genesis_Output {
 				$classes[] = 'large-featured';
 			}
 		}
-		return $classes;
+		return apply_filters( 'display_featured_image_genesis_classes', $classes );
 	}
 
 	/**