diff --git a/src/Illuminate/Database/Connection.php b/src/Illuminate/Database/Connection.php
index d8af11f1fb29..dc51446c88b2 100755
--- a/src/Illuminate/Database/Connection.php
+++ b/src/Illuminate/Database/Connection.php
@@ -1101,6 +1101,8 @@ public function raw($value)
      * @param  string|float|int|bool|null  $value
      * @param  bool  $binary
      * @return string
+     *
+     * @throws \RuntimeException
      */
     public function escape($value, $binary = false)
     {
@@ -1154,6 +1156,8 @@ protected function escapeBool($value)
      *
      * @param  string  $value
      * @return string
+     *
+     * @throws \RuntimeException
      */
     protected function escapeBinary($value)
     {