diff --git a/drivers/lib/Drupal/Driver/Database/sqlsrv/Schema.php b/drivers/lib/Drupal/Driver/Database/sqlsrv/Schema.php
index d839981..c48f44a 100644
--- a/drivers/lib/Drupal/Driver/Database/sqlsrv/Schema.php
+++ b/drivers/lib/Drupal/Driver/Database/sqlsrv/Schema.php
@@ -362,7 +362,10 @@ class Schema extends DatabaseSchema {
    *   True if the table exists, false otherwise.
    */
   public function tableExists($table) {
-
+    // If $table is NULL, then $table[0] will generate a notice.
+    if (empty($table)) {
+      return FALSE;
+    }
     // Temporary tables and regular tables cannot be verified in the same way.
     $query = NULL;
     if ($table[0] == '#') {