diff --git a/IDE/Renesas/cs+/Projects/README b/IDE/Renesas/cs+/Projects/README
index 38c8bc285..6f382d039 100644
--- a/IDE/Renesas/cs+/Projects/README
+++ b/IDE/Renesas/cs+/Projects/README
@@ -13,3 +13,6 @@ test:
   - set stack size in "bsp/stacksct.h"
   Build "test" wolfCrypt
 
+
+Note: It could need to initialize clock for the device. You can refer the link below
+https://www.renesas.com/ja/document/apn/rx65n-group-rx651-group-initial-settings-example-rev211?language=en&r=1054461
diff --git a/IDE/Renesas/cs+/Projects/common/user_settings.h b/IDE/Renesas/cs+/Projects/common/user_settings.h
index 3d923a2cf..02f0e6348 100644
--- a/IDE/Renesas/cs+/Projects/common/user_settings.h
+++ b/IDE/Renesas/cs+/Projects/common/user_settings.h
@@ -76,4 +76,5 @@
 
 #define NO_FILESYSTEM
 
+#define XSTRCASECMP(s1,s2) strcmp((s1),(s2))
 
diff --git a/IDE/Renesas/cs+/Projects/common/wolfssl_dummy.c b/IDE/Renesas/cs+/Projects/common/wolfssl_dummy.c
index 90f724e65..1f367b4e0 100644
--- a/IDE/Renesas/cs+/Projects/common/wolfssl_dummy.c
+++ b/IDE/Renesas/cs+/Projects/common/wolfssl_dummy.c
@@ -59,4 +59,9 @@ void abort(void)
     while(1);
 }
 
+/* dummy return true when char is alphanumeric character */
+int isascii(const char *s)
+{
+    return isalnum(s);
+}