diff --git a/boards/AT32F435RM.json b/boards/AT32F435RM.json
index 954807ec7..d02046bdb 100644
--- a/boards/AT32F435RM.json
+++ b/boards/AT32F435RM.json
@@ -2,7 +2,7 @@
     "build": {
         "core": "ArteryTek AT32",
         "cpu": "cortex-m4",
-        "extra_flags": "-DAT32F4xx -DAT32F435 -DAT32F4 -DAT32 -DMCU_NAME=at32f435",
+        "extra_flags": "-DAT32F4xx -DAT32F435 -DAT32F4 -DAT32 -DMCU_NAME=at32f435m",
         "f_cpu": "288000000L",
         "mcu": "at32f435",
         "product_line": "AT32F435xM",
diff --git a/script/pre_script.py b/script/pre_script.py
index b1567269a..19a8e5b53 100644
--- a/script/pre_script.py
+++ b/script/pre_script.py
@@ -50,7 +50,7 @@
     BUILD_UNFLAGS=["-Og", "-Os", "-DDEBUG"],
     ASFLAGS=system_flags + common_flags,
     CCFLAGS=system_flags + common_flags,
-    CPPDEFINES=[("TARGET_MCU", env["BOARD_MCU"]), ("GIT_VERSION", git_version)],
+    CPPDEFINES=[("GIT_VERSION", git_version)],
     LINKFLAGS=system_flags + common_flags,
 )
 
diff --git a/src/core/target.c b/src/core/target.c
index 5f40b186f..637c52dd3 100644
--- a/src/core/target.c
+++ b/src/core/target.c
@@ -15,7 +15,7 @@ target_t target = {
 #define MACRO_STR(name) _MACRO_STR(name)
 
 target_info_t target_info = {
-    .mcu = MACRO_STR(TARGET_MCU),
+    .mcu = MACRO_STR(MCU_NAME),
     .git_version = MACRO_STR(GIT_VERSION),
     .quic_protocol_version = QUIC_PROTOCOL_VERSION,