diff --git a/quickjs.c b/quickjs.c
index 2423d40..76b990b 100644
--- a/quickjs.c
+++ b/quickjs.c
@@ -3994,6 +3994,18 @@ JSValue JS_NewAtomString(JSContext *ctx, const char *str)
     return val;
 }
 
+uint8_t *JS_ToCStringLenRaw(JSContext *ctx, size_t *plen, JSValueConst val)
+{
+    if (JS_VALUE_GET_TAG(val) != JS_TAG_STRING)
+    {
+        if(plen) *plen = 0;
+        return NULL;
+    }
+    JSString *str = JS_VALUE_GET_STRING(val);
+    if(plen) *plen = str->len;
+    return str->u.str8;
+}
+
 /* return (NULL, 0) if exception. */
 /* return pointer into a JSString with a live ref_count */
 /* cesu8 determines if non-BMP1 codepoints are encoded as 1 or 2 utf-8 sequences */
diff --git a/quickjs.h b/quickjs.h
index 09ad07d..5f9f805 100644
--- a/quickjs.h
+++ b/quickjs.h
@@ -702,6 +702,7 @@ JSValue JS_NewString(JSContext *ctx, const char *str);
 JSValue JS_NewAtomString(JSContext *ctx, const char *str);
 JSValue JS_ToString(JSContext *ctx, JSValueConst val);
 JSValue JS_ToPropertyKey(JSContext *ctx, JSValueConst val);
+uint8_t *JS_ToCStringLenRaw(JSContext *ctx, size_t *plen, JSValueConst val1);
 const char *JS_ToCStringLen2(JSContext *ctx, size_t *plen, JSValueConst val1, JS_BOOL cesu8);
 static inline const char *JS_ToCStringLen(JSContext *ctx, size_t *plen, JSValueConst val1)
 {