diff --git a/src/wp-includes/canonical.php b/src/wp-includes/canonical.php
index 0b94791fd9b45..49199710c2e8f 100644
--- a/src/wp-includes/canonical.php
+++ b/src/wp-includes/canonical.php
@@ -717,7 +717,9 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
 		$redirect['host'] = $original['host'];
 	}
 
-	$compare_original = array( $original['host'], $original['path'] );
+	if ( ! empty( $original['host'] ) ) {
+		$compare_original = array( $original['host'], $original['path'] );
+	}
 
 	if ( ! empty( $original['port'] ) ) {
 		$compare_original[] = $original['port'];