diff --git a/ecmascript/base/json_stringifier.cpp b/ecmascript/base/json_stringifier.cpp
index 352de5ed2fe19a6426b6cd3ffcb109b6060f7634..719f4a738ee86ead096a09894121861b53fa861b 100644
--- a/ecmascript/base/json_stringifier.cpp
+++ b/ecmascript/base/json_stringifier.cpp
@@ -41,7 +41,7 @@ constexpr int FOUR_HEX = 4;
 
 bool JsonStringifier::IsFastValueToQuotedString(const char *value)
 {
-    if (strpbrk(value, "\"\\\b\f\n\r\t") == nullptr) {
+    if (strpbrk(value, "\"\\\b\f\n\r\t") != nullptr) {
         return false;
     }
     while (*value != '\0') {