diff --git a/stmhal/Makefile b/stmhal/Makefile
index c3460c8c5..5f31be577 100644
--- a/stmhal/Makefile
+++ b/stmhal/Makefile
@@ -49,6 +49,7 @@ CFLAGS_MCU_f4 = $(CFLAGS_CORTEX_M) -mtune=cortex-m4 -mcpu=cortex-m4 -DMCU_SERIES
 CFLAGS_MCU_f7 = $(CFLAGS_CORTEX_M) -mtune=cortex-m7 -mcpu=cortex-m7 -DMCU_SERIES_F7
 
 CFLAGS = $(INC) -Wall -Wpointer-arith -Werror -ansi -std=gnu99 -nostdlib $(CFLAGS_MOD)
+CFLAGS += -D$(CMSIS_MCU)
 CFLAGS += $(CFLAGS_MCU_$(MCU_SERIES))
 CFLAGS += $(COPT)
 CFLAGS += -Iboards/$(BOARD)
diff --git a/stmhal/boards/CERB40/stm32f4xx_hal_conf.h b/stmhal/boards/CERB40/stm32f4xx_hal_conf.h
index e878bde3d..d968dc754 100644
--- a/stmhal/boards/CERB40/stm32f4xx_hal_conf.h
+++ b/stmhal/boards/CERB40/stm32f4xx_hal_conf.h
@@ -46,7 +46,6 @@
 /* Exported types ------------------------------------------------------------*/
 /* Exported constants --------------------------------------------------------*/
 
-#define STM32F405xx
 #define USE_USB_FS
 
 /* ########################## Module Selection ############################## */
diff --git a/stmhal/boards/ESPRUINO_PICO/stm32f4xx_hal_conf.h b/stmhal/boards/ESPRUINO_PICO/stm32f4xx_hal_conf.h
index 044862a0e..fcbb6637a 100644
--- a/stmhal/boards/ESPRUINO_PICO/stm32f4xx_hal_conf.h
+++ b/stmhal/boards/ESPRUINO_PICO/stm32f4xx_hal_conf.h
@@ -46,7 +46,6 @@
 /* Exported types ------------------------------------------------------------*/
 /* Exported constants --------------------------------------------------------*/
 
-#define STM32F401xE
 #define USE_USB_FS
 
 /* ########################## Module Selection ############################## */
diff --git a/stmhal/boards/HYDRABUS/stm32f4xx_hal_conf.h b/stmhal/boards/HYDRABUS/stm32f4xx_hal_conf.h
index 04dbd0724..dffaaa906 100644
--- a/stmhal/boards/HYDRABUS/stm32f4xx_hal_conf.h
+++ b/stmhal/boards/HYDRABUS/stm32f4xx_hal_conf.h
@@ -46,7 +46,6 @@
 /* Exported types ------------------------------------------------------------*/
 /* Exported constants --------------------------------------------------------*/
 
-#define STM32F405xx
 #define USE_USB_FS
 
 /* ########################## Module Selection ############################## */
diff --git a/stmhal/boards/NETDUINO_PLUS_2/stm32f4xx_hal_conf.h b/stmhal/boards/NETDUINO_PLUS_2/stm32f4xx_hal_conf.h
index cbea89614..46f7935c5 100644
--- a/stmhal/boards/NETDUINO_PLUS_2/stm32f4xx_hal_conf.h
+++ b/stmhal/boards/NETDUINO_PLUS_2/stm32f4xx_hal_conf.h
@@ -46,7 +46,6 @@
 /* Exported types ------------------------------------------------------------*/
 /* Exported constants --------------------------------------------------------*/
 
-#define STM32F405xx
 #define USE_USB_FS
 
 /* ########################## Module Selection ############################## */
diff --git a/stmhal/boards/PYBV10/stm32f4xx_hal_conf.h b/stmhal/boards/PYBV10/stm32f4xx_hal_conf.h
index 5a0c3d03a..5b5359667 100644
--- a/stmhal/boards/PYBV10/stm32f4xx_hal_conf.h
+++ b/stmhal/boards/PYBV10/stm32f4xx_hal_conf.h
@@ -46,7 +46,6 @@
 /* Exported types ------------------------------------------------------------*/
 /* Exported constants --------------------------------------------------------*/
 
-#define STM32F405xx
 #define USE_USB_FS
 
 /* ########################## Module Selection ############################## */
diff --git a/stmhal/boards/PYBV3/stm32f4xx_hal_conf.h b/stmhal/boards/PYBV3/stm32f4xx_hal_conf.h
index 04dbd0724..dffaaa906 100644
--- a/stmhal/boards/PYBV3/stm32f4xx_hal_conf.h
+++ b/stmhal/boards/PYBV3/stm32f4xx_hal_conf.h
@@ -46,7 +46,6 @@
 /* Exported types ------------------------------------------------------------*/
 /* Exported constants --------------------------------------------------------*/
 
-#define STM32F405xx
 #define USE_USB_FS
 
 /* ########################## Module Selection ############################## */
diff --git a/stmhal/boards/PYBV4/stm32f4xx_hal_conf.h b/stmhal/boards/PYBV4/stm32f4xx_hal_conf.h
index 04dbd0724..dffaaa906 100644
--- a/stmhal/boards/PYBV4/stm32f4xx_hal_conf.h
+++ b/stmhal/boards/PYBV4/stm32f4xx_hal_conf.h
@@ -46,7 +46,6 @@
 /* Exported types ------------------------------------------------------------*/
 /* Exported constants --------------------------------------------------------*/
 
-#define STM32F405xx
 #define USE_USB_FS
 
 /* ########################## Module Selection ############################## */
diff --git a/stmhal/boards/STM32F4DISC/stm32f4xx_hal_conf.h b/stmhal/boards/STM32F4DISC/stm32f4xx_hal_conf.h
index b62fd1c5c..dffaaa906 100644
--- a/stmhal/boards/STM32F4DISC/stm32f4xx_hal_conf.h
+++ b/stmhal/boards/STM32F4DISC/stm32f4xx_hal_conf.h
@@ -46,7 +46,6 @@
 /* Exported types ------------------------------------------------------------*/
 /* Exported constants --------------------------------------------------------*/
 
-#define STM32F407xx
 #define USE_USB_FS
 
 /* ########################## Module Selection ############################## */
diff --git a/stmhal/boards/STM32F7DISC/stm32f7xx_hal_conf.h b/stmhal/boards/STM32F7DISC/stm32f7xx_hal_conf.h
index 5c6b22dd0..fb33add2b 100644
--- a/stmhal/boards/STM32F7DISC/stm32f7xx_hal_conf.h
+++ b/stmhal/boards/STM32F7DISC/stm32f7xx_hal_conf.h
@@ -46,7 +46,6 @@
 /* Exported types ------------------------------------------------------------*/
 /* Exported constants --------------------------------------------------------*/
 
-#define STM32F746xx
 #define USE_USB_FS
 
 /* ########################## Module Selection ############################## */