diff --git a/gecka-terms-ordering.php b/gecka-terms-ordering.php
index 84924e6..7a0848c 100644
--- a/gecka-terms-ordering.php
+++ b/gecka-terms-ordering.php
@@ -312,7 +312,7 @@ public function terms_clauses( $clauses, $taxonomies, $args ) {
 		global $wpdb;
 
 		$taxonomies = (array) $taxonomies;
-		if ( sizeof( $taxonomies === 1 ) ) {
+		if ( sizeof( $taxonomies ) === 1 ) {
 			$taxonomy = array_shift( $taxonomies );
 		} else {
 			return $clauses;
@@ -418,4 +418,4 @@ function remove_term_ordering_support( $taxonomy ) {
 	function has_term_ordering_support( $taxonomy ) {
 		return Gecka_Terms_Ordering::has_support( $taxonomy );
 	}
-}
\ No newline at end of file
+}