diff --git a/api/src/Egw.php b/api/src/Egw.php
index b9c8f4f403..5c52f126f2 100644
--- a/api/src/Egw.php
+++ b/api/src/Egw.php
@@ -276,16 +276,19 @@ class Egw extends Egw\Base
 			}
 		}
 
-		// Load the (depricated) app include files if they exists
-		if (EGW_APP_INC != "" && ! preg_match ('/phpgwapi/i', EGW_APP_INC) &&
-			file_exists(EGW_APP_INC . '/functions.inc.php') && !isset($_GET['menuaction']))
+		if (defined('EGW_APP_INC'))
 		{
-			include(EGW_APP_INC . '/functions.inc.php');
-		}
-		if (!@$GLOBALS['egw_info']['flags']['noheader'] && !@$GLOBALS['egw_info']['flags']['noappheader'] &&
-			file_exists(EGW_APP_INC . '/header.inc.php') && !isset($_GET['menuaction']))
-		{
-			include(EGW_APP_INC . '/header.inc.php');
+			// Load the (depricated) app include files if they exists
+			if (EGW_APP_INC != "" && ! preg_match ('/phpgwapi/i', EGW_APP_INC) &&
+				file_exists(EGW_APP_INC . '/functions.inc.php') && !isset($_GET['menuaction']))
+			{
+				include(EGW_APP_INC . '/functions.inc.php');
+			}
+			if (!@$GLOBALS['egw_info']['flags']['noheader'] && !@$GLOBALS['egw_info']['flags']['noappheader'] &&
+				file_exists(EGW_APP_INC . '/header.inc.php') && !isset($_GET['menuaction']))
+			{
+				include(EGW_APP_INC . '/header.inc.php');
+			}
 		}
 	}