diff --git a/interfaces/plugin/vibrator/src/vibrator_napi_utils.cpp b/interfaces/plugin/vibrator/src/vibrator_napi_utils.cpp
index 749219902e8300214c7c5fcccd370c8fbb0d2f35..29ac5a7bf608525111b6b651f4a9a00c02d7aebb 100644
--- a/interfaces/plugin/vibrator/src/vibrator_napi_utils.cpp
+++ b/interfaces/plugin/vibrator/src/vibrator_napi_utils.cpp
@@ -99,7 +99,7 @@ bool GetStringValue(const napi_env &env, const napi_value &value, string &result
     NAPI_CALL_BASE(env, napi_get_value_string_utf8(env, value, nullptr, 0, &bufLength), false);
     char str[STRING_LENGTH_MAX] = {0};
     size_t strLen = 0;
-    NAPI_CALL_BASE(env, napi_get_value_string_utf8(env, value, str, bufLength, &strLen), false);
+    NAPI_CALL_BASE(env, napi_get_value_string_utf8(env, value, str, bufLength + 1, &strLen), false);
     result = str;
     return true;
 }
@@ -244,4 +244,4 @@ void EmitPromiseWork(sptr<AsyncCallbackInfo> asyncCallbackInfo)
     }
 }
 }  // namespace Sensors
-}  // namespace OHOS
\ No newline at end of file
+}  // namespace OHOS