diff --git a/features/mbedtls/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/mbedtls_device.h b/features/mbedtls/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/mbedtls_device.h
index dfbc82055ef..4fafb6f5808 100644
--- a/features/mbedtls/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/mbedtls_device.h
+++ b/features/mbedtls/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/mbedtls_device.h
@@ -22,8 +22,6 @@
 
 #define MBEDTLS_AES_ALT
 
-#define MBEDTLS_SHA256_ALT
-
 #define MBEDTLS_SHA1_ALT
 
 #define MBEDTLS_MD5_ALT
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 dfbc82055ef..4fafb6f5808 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
@@ -22,8 +22,6 @@
 
 #define MBEDTLS_AES_ALT
 
-#define MBEDTLS_SHA256_ALT
-
 #define MBEDTLS_SHA1_ALT
 
 #define MBEDTLS_MD5_ALT
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 8382789dfbe..ddce19c4703 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
@@ -23,8 +23,6 @@
 #define MBEDTLS_AES_ALT
 #define MBEDTLS_SHA1_ALT
 
-
-#define MBEDTLS_SHA256_ALT
 #define MBEDTLS_MD5_ALT
 
 #endif /* MBEDTLS_DEVICE_H */