diff --git a/console.php b/console.php
index 6edf10e473fca..26ad7ed7cfdd7 100644
--- a/console.php
+++ b/console.php
@@ -44,7 +44,7 @@
 }
 
 try {
-	require_once 'lib/base.php';
+	require_once __DIR__ . '/lib/base.php';
 
 	// set to run indefinitely if needed
 	set_time_limit(0);
diff --git a/cron.php b/cron.php
index f0a23da73358d..8f1e4e2667557 100644
--- a/cron.php
+++ b/cron.php
@@ -33,7 +33,7 @@
 
 try {
 
-	require_once 'lib/base.php';
+	require_once __DIR__ . '/lib/base.php';
 
 	if (\OCP\Util::needUpgrade()) {
 		\OCP\Util::writeLog('cron', 'Update required, skipping cron', \OCP\Util::DEBUG);
diff --git a/index.php b/index.php
index 5e1832e353eab..7e43dcfa0d4d0 100644
--- a/index.php
+++ b/index.php
@@ -42,8 +42,8 @@
 }
 
 try {
-	
-	require_once 'lib/base.php';
+
+	require_once __DIR__ . '/lib/base.php';
 
 	OC::handleRequest();
 
diff --git a/ocs-provider/index.php b/ocs-provider/index.php
index 316b39cace8ab..85b3b783ba8fe 100644
--- a/ocs-provider/index.php
+++ b/ocs-provider/index.php
@@ -19,8 +19,8 @@
  *
  */
 
-require_once('../lib/base.php');
-require_once(__DIR__ . '/provider.php');
+require_once __DIR__ . '/../lib/base.php';
+require_once __DIR__ . '/provider.php';
 
 header('Content-Type: application/json');
 
diff --git a/ocs/providers.php b/ocs/providers.php
index be0aff8add221..9efca14768e89 100644
--- a/ocs/providers.php
+++ b/ocs/providers.php
@@ -23,7 +23,7 @@
  *
  */
 
-require_once '../lib/base.php';
+require_once __DIR__ . '/../lib/base.php';
 
 header('Content-type: application/xml');
 
diff --git a/ocs/v1.php b/ocs/v1.php
index abe76d100ce43..e0e60d39914d5 100644
--- a/ocs/v1.php
+++ b/ocs/v1.php
@@ -28,7 +28,7 @@
  *
  */
 
-require_once '../lib/base.php';
+require_once __DIR__ . '/../lib/base.php';
 
 if (\OCP\Util::needUpgrade()
 	|| \OC::$server->getSystemConfig()->getValue('maintenance', false)
diff --git a/ocs/v2.php b/ocs/v2.php
index 45f65033056a0..dc57431e6c6bb 100644
--- a/ocs/v2.php
+++ b/ocs/v2.php
@@ -20,4 +20,4 @@
  *
  */
 
-require_once 'v1.php';
+require_once __DIR__ . '/v1.php';
diff --git a/public.php b/public.php
index ed7c172ecd568..2ef39cf414490 100644
--- a/public.php
+++ b/public.php
@@ -27,7 +27,7 @@
  */
 try {
 
-	require_once 'lib/base.php';
+	require_once __DIR__ . '/lib/base.php';
 	if (\OCP\Util::needUpgrade()) {
 		// since the behavior of apps or remotes are unpredictable during
 		// an upgrade, return a 503 directly
diff --git a/remote.php b/remote.php
index bfc177c19e4d5..79fa7802310aa 100644
--- a/remote.php
+++ b/remote.php
@@ -86,7 +86,7 @@ function handleException(Exception $e) {
 }
 
 try {
-	require_once 'lib/base.php';
+	require_once __DIR__ . '/lib/base.php';
 
 	if (\OCP\Util::needUpgrade()) {
 		// since the behavior of apps or remotes are unpredictable during
diff --git a/status.php b/status.php
index a24bb30456e4c..7d1a50f935c41 100644
--- a/status.php
+++ b/status.php
@@ -29,7 +29,7 @@
 
 try {
 
-	require_once 'lib/base.php';
+	require_once __DIR__ . '/lib/base.php';
 
 	$systemConfig = \OC::$server->getSystemConfig();