diff --git a/includes/class-sp-event.php b/includes/class-sp-event.php
index d972743d..0f0a3dc2 100644
--- a/includes/class-sp-event.php
+++ b/includes/class-sp-event.php
@@ -569,6 +569,9 @@ class SP_Event extends SP_Custom_Post{
 				),
 			),
 		) );
+		if ( ! is_array( $duties ) ) {
+			return array();
+		}
 
 		if ( ! $include_empty && empty( $duties ) ) return null;