diff --git a/cm_backtrace/cm_backtrace.c b/cm_backtrace/cm_backtrace.c
index 7359420..e7ce1ad 100644
--- a/cm_backtrace/cm_backtrace.c
+++ b/cm_backtrace/cm_backtrace.c
@@ -35,7 +35,7 @@
     #error "must be C99 or higher. try to add '-std=c99' to compile parameters"
 #endif
 
-#if defined(__CC_ARM) || defined(__CLANG_ARM)
+#if defined(__ARMCC_VERSION)
     #define SECTION_START(_name_)                _name_##$$Base
     #define SECTION_END(_name_)                  _name_##$$Limit
     #define IMAGE_SECTION_START(_name_)          Image$$##_name_##$$Base
@@ -145,7 +145,7 @@ void cm_backtrace_init(const char *firmware_name, const char *hardware_ver, cons
     strncpy(hw_ver, hardware_ver, CMB_NAME_MAX);
     strncpy(sw_ver, software_ver, CMB_NAME_MAX);
 
-#if defined(__CC_ARM) || defined(__CLANG_ARM)
+#if defined(__ARMCC_VERSION)
     main_stack_start_addr = (uint32_t)&CSTACK_BLOCK_START(CMB_CSTACK_BLOCK_NAME);
     main_stack_size = (uint32_t)&CSTACK_BLOCK_END(CMB_CSTACK_BLOCK_NAME) - main_stack_start_addr;
     code_start_addr = (uint32_t)&CODE_SECTION_START(CMB_CODE_SECTION_NAME);
diff --git a/cm_backtrace/cmb_def.h b/cm_backtrace/cmb_def.h
index d41b5ec..42f6298 100644
--- a/cm_backtrace/cmb_def.h
+++ b/cm_backtrace/cmb_def.h
@@ -62,7 +62,7 @@
 #endif
 
 
-#if defined(__CC_ARM) || defined(__CLANG_ARM)
+#if defined(__ARMCC_VERSION)
     /* C stack block name, default is STACK */
     #ifndef CMB_CSTACK_BLOCK_NAME
     #define CMB_CSTACK_BLOCK_NAME          STACK
@@ -301,7 +301,7 @@ if (!(EXPR))                                                                   \
 }
 
 /* ELF(Executable and Linking Format) file extension name for each compiler */
-#if defined(__CC_ARM) || defined(__CLANG_ARM)
+#if defined(__ARMCC_VERSION)
     #define CMB_ELF_FILE_EXTENSION_NAME          ".axf"
 #elif defined(__ICCARM__)
     #define CMB_ELF_FILE_EXTENSION_NAME          ".out"
@@ -355,7 +355,7 @@ if (!(EXPR))                                                                   \
         mov r0, sp
         bx lr
     }
-#elif defined(__CLANG_ARM)
+#elif defined(__clang__)
     __attribute__( (always_inline) ) static __inline uint32_t cmb_get_msp(void) {
         uint32_t result;
         __asm volatile ("mrs %0, msp" : "=r" (result) );