diff --git a/src/RTEMS/base/rtems_config.c b/src/RTEMS/base/rtems_config.c
index dc2b9a8b6..e2abccb52 100644
--- a/src/RTEMS/base/rtems_config.c
+++ b/src/RTEMS/base/rtems_config.c
@@ -28,6 +28,7 @@
 #define CONFIGURE_MAXIMUM_SEMAPHORES        rtems_resource_unlimited(500)
 #define CONFIGURE_MAXIMUM_TIMERS            rtems_resource_unlimited(20)
 #define CONFIGURE_MAXIMUM_MESSAGE_QUEUES    rtems_resource_unlimited(5)
+#define CONFIGURE_MAXIMUM_USER_EXTENSIONS   2
 
 #define CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS 100
 #define CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM