diff --git a/cm_backtrace/cm_backtrace.c b/cm_backtrace/cm_backtrace.c
index 4abf2dc..7c63ddb 100644
--- a/cm_backtrace/cm_backtrace.c
+++ b/cm_backtrace/cm_backtrace.c
@@ -31,6 +31,10 @@
 #include <string.h>
 #include <stdio.h>
 
+#if __STDC_VERSION__ < 199901L
+    #error "must be C99 or higher. try to add '-std=c99' to compile parameters"
+#endif
+
 #if defined(__CC_ARM)
     #define SECTION_START(_name_)                _name_##$$Base
     #define SECTION_END(_name_)                  _name_##$$Limit
diff --git a/cm_backtrace/cmb_def.h b/cm_backtrace/cmb_def.h
index 9c25400..e591b13 100644
--- a/cm_backtrace/cmb_def.h
+++ b/cm_backtrace/cmb_def.h
@@ -289,10 +289,6 @@ if (!(EXPR))                                                                   \
     #error "CMB_CPU_PLATFORM_TYPE isn't defined in 'cmb_cfg.h'"
 #endif
 
-#if __STDC_VERSION__ < 199901L
-    #error "not supported compiler, must be C99 or higher. try to add '-std=c99' to compile parameters"
-#endif
-
 #if (defined(CMB_USING_BARE_METAL_PLATFORM) && defined(CMB_USING_OS_PLATFORM))
     #error "CMB_USING_BARE_METAL_PLATFORM and CMB_USING_OS_PLATFORM only one of them can be used"
 #elif defined(CMB_USING_OS_PLATFORM)