diff --git a/includes/hooks-buddypress-group.php b/includes/hooks-buddypress-group.php
index 164a50f..dc246cb 100644
--- a/includes/hooks-buddypress-group.php
+++ b/includes/hooks-buddypress-group.php
@@ -237,6 +237,10 @@ function cacsp_filter_query_for_bp_group( $query ) {
 
 	// Convert group IDs to a tax query.
 	$tq = $query->get( 'tax_query' );
+	if ( ! is_array( $tq ) ) {
+		$tq = array();
+	}
+
 	$group_terms = array();
 	foreach ( $group_ids as $group_id ) {
 		$group_terms[] = 'group_' . $group_id;