diff --git a/kernel/include/limits.h b/kernel/include/limits.h
index c818b31c7b0f561ad8653e26acf759864ec2fa08..6e1a9db2cf0c2a55f776d309ba05d35b46bfde65 100755
--- a/kernel/include/limits.h
+++ b/kernel/include/limits.h
@@ -5,6 +5,8 @@
 
 #include <bits/alltypes.h> /* __LONG_MAX */
 
+#include "los_config.h"
+
 #ifndef PAGE_SIZE
 #define PAGE_SIZE 4096
 #endif
diff --git a/kernel/src/stdio/vfprintf.c b/kernel/src/stdio/vfprintf.c
index bb8c00bad3db5b17549eac8a817f7092413c3cdc..09e252dfcb5cacab3f20c988a56e35f73f723a5c 100644
--- a/kernel/src/stdio/vfprintf.c
+++ b/kernel/src/stdio/vfprintf.c
@@ -1,7 +1,10 @@
 #include "stdio_impl.h"
 #include <errno.h>
 #include <ctype.h>
+/* Undef the CHAR macro definition in los_typedef.h to avoid conflicts with the following CHAR */
+#define CHAR _CHAR
 #include <limits.h>
+#undef CHAR
 #include <string.h>
 #include <stdarg.h>
 #include <stddef.h>
diff --git a/kernel_m/include/limits.h b/kernel_m/include/limits.h
index 20fda4a1b7accb0baf1775b6e8a811f608535a0a..78ca831ff2cc5ef9d4784d749fb59eb81677c59b 100755
--- a/kernel_m/include/limits.h
+++ b/kernel_m/include/limits.h
@@ -70,9 +70,9 @@
 #define PTHREAD_KEYS_MAX 128
 #define PTHREAD_STACK_MIN 2048
 #define PTHREAD_DESTRUCTOR_ITERATIONS 4
-#define SEM_VALUE_MAX 0x7fffffff
+#define SEM_VALUE_MAX 0xffff
 #define SEM_NSEMS_MAX 256
-#define DELAYTIMER_MAX 0x7fffffff
+#define DELAYTIMER_MAX 32
 #define MQ_PRIO_MAX 32768
 #define LOGIN_NAME_MAX 256