diff --git a/includes/fields/class-acf-field-link.php b/includes/fields/class-acf-field-link.php
index d5bfb55e..ede821a3 100644
--- a/includes/fields/class-acf-field-link.php
+++ b/includes/fields/class-acf-field-link.php
@@ -204,7 +204,7 @@ function format_value( $value, $post_id, $field ) {
 		
 		
 		// format value
-		if( $field['return_format'] == 'url' ) {
+		if( isset($field['return_format']) && $field['return_format'] == 'url' ) {
 			
 			return $link['url'];
 			
@@ -284,4 +284,4 @@ function update_value( $value, $post_id, $field ) {
 
 endif; // class_exists check
 
-?>
\ No newline at end of file
+?>