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 7c52183f23..452a796304 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
@@ -23,7 +23,6 @@
 #define MBEDTLS_AES_ALT
 #define MBEDTLS_SHA1_ALT
 
-#define MBEDTLS_SHA1_C
 
 
 #endif /* MBEDTLS_DEVICE_H */