diff --git a/appveyor.yml b/appveyor.yml
index 28ad7daf649..33fd54b3f59 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -25,6 +25,7 @@ install:
   - echo extension=php_openssl.dll >> php.ini
   - echo extension=php_sqlsrv.dll >> php.ini
   - echo extension=php_pdo_sqlsrv.dll >> php.ini
+  - echo extension=php_pdo_mysql.dll >> php.ini
   - echo extension=php_intl.dll >> php.ini
   - echo extension=php_mbstring.dll >> php.ini
   - cd C:\projects\cakephp