diff --git a/cmsis/RTE_Components.h b/cmsis/RTE_Components.h
new file mode 100644
index 0000000000..1a1b438e80
--- /dev/null
+++ b/cmsis/RTE_Components.h
@@ -0,0 +1,24 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2018 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef RTE_COMPONENTS_H
+#define RTE_COMPONENTS_H
+
+#define CMSIS_device_header <cmsis.h>
+#include "mbed_rtx_conf.h"
+
+#endif
+
+
diff --git a/rtos/TARGET_CORTEX/mbed_rtx_conf.h b/rtos/TARGET_CORTEX/mbed_rtx_conf.h
index 91d024a260..a2f458ee6e 100644
--- a/rtos/TARGET_CORTEX/mbed_rtx_conf.h
+++ b/rtos/TARGET_CORTEX/mbed_rtx_conf.h
@@ -57,4 +57,14 @@
 #define OS_IDLE_THREAD_TZ_MOD_ID     1
 #define OS_TIMER_THREAD_TZ_MOD_ID    1
 
+#ifndef MBED_CONF_TZ_PROCESS_STACK_SIZE
+#define MBED_CONF_TZ_PROCESS_STACK_SIZE  512
+#endif
+#ifndef MBED_CONF_TZ_PROCESS_STACK_SLOTS
+#define MBED_CONF_TZ_PROCESS_STACK_SLOTS  8
+#endif
+
+#define TZ_PROCESS_STACK_SLOTS  MBED_CONF_TZ_PROCESS_STACK_SLOTS
+#define TZ_PROCESS_STACK_SIZE  MBED_CONF_TZ_PROCESS_STACK_SIZE
+
 #endif /* MBED_RTX_CONF_H */