diff --git a/features/mbedtls/targets/TARGET_STM/TARGET_STM32F7/TARGET_NUCLEO_F756ZG/mbedtls_device.h b/features/mbedtls/targets/TARGET_STM/TARGET_STM32F7/TARGET_NUCLEO_F756ZG/mbedtls_device.h
index 9a06a1cba5..7c52183f23 100644
--- a/features/mbedtls/targets/TARGET_STM/TARGET_STM32F7/TARGET_NUCLEO_F756ZG/mbedtls_device.h
+++ b/features/mbedtls/targets/TARGET_STM/TARGET_STM32F7/TARGET_NUCLEO_F756ZG/mbedtls_device.h
@@ -21,6 +21,9 @@
 #define MBEDTLS_DEVICE_H
 
 #define MBEDTLS_AES_ALT
+#define MBEDTLS_SHA1_ALT
+
+#define MBEDTLS_SHA1_C
 
 
 #endif /* MBEDTLS_DEVICE_H */