diff --git a/features/mbedtls/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/mbedtls_device.h b/features/mbedtls/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/mbedtls_device.h
index c78d135083..8609b4ecc6 100644
--- a/features/mbedtls/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/mbedtls_device.h
+++ b/features/mbedtls/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/mbedtls_device.h
@@ -1,5 +1,5 @@
 /*
- *  mbedtls_device.h 
+ *  mbedtls_device.h
  *******************************************************************************
  * Copyright (c) 2017, STMicroelectronics
  *  SPDX-License-Identifier: Apache-2.0
@@ -26,4 +26,7 @@
 
 #define MBEDTLS_SHA1_ALT
 
+#define MBEDTLS_MD5_ALT
+
+#define MBEDTLS_MD5_C
 #endif /* MBEDTLS_DEVICE_H */