diff --git a/tests/checkstring.phpt b/tests/checkstring.phpt
index a19788e..b5f2790 100644
--- a/tests/checkstring.phpt
+++ b/tests/checkstring.phpt
@@ -15,7 +15,10 @@ try {
 }
 ?>
 ===EOF===
---EXPECT--
+--EXPECTF--
+Deprecated: Function V8Js::checkString() is deprecated in %s on line %d
 bool(true)
+
+Deprecated: Function V8Js::checkString() is deprecated in %s on line %d
 string(60) "V8Js::checkString():1: SyntaxError: Unexpected token ILLEGAL"
 ===EOF===
diff --git a/tests/checkstring_compile.phpt b/tests/checkstring_compile.phpt
new file mode 100644
index 0000000..2c9e188
--- /dev/null
+++ b/tests/checkstring_compile.phpt
@@ -0,0 +1,21 @@
+--TEST--
+Test V8::executeString() : Script validator test using compileString
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+
+$v8 = new V8Js();
+var_dump($v8->compileString('print("Hello World!");'));
+
+try {
+	var_dump($v8->compileString('print("Hello World!);'));
+} catch (V8JsScriptException $e) {
+	var_dump($e->getMessage());
+}
+?>
+===EOF===
+--EXPECTF--
+resource(%d) of type (V8Js script)
+string(62) "V8Js::compileString():1: SyntaxError: Unexpected token ILLEGAL"
+===EOF===
diff --git a/v8js.cc b/v8js.cc
index 4c19c60..2201ece 100644
--- a/v8js.cc
+++ b/v8js.cc
@@ -1732,7 +1732,7 @@ static const zend_function_entry v8js_methods[] = { /* {{{ */
 	PHP_ME(V8Js,	executeString,			arginfo_v8js_executestring,			ZEND_ACC_PUBLIC)
 	PHP_ME(V8Js,	compileString,			arginfo_v8js_compilestring,			ZEND_ACC_PUBLIC)
 	PHP_ME(V8Js,    executeScript,			arginfo_v8js_executescript,			ZEND_ACC_PUBLIC)
-	PHP_ME(V8Js,    checkString,			arginfo_v8js_checkstring,			ZEND_ACC_PUBLIC)
+	PHP_ME(V8Js,    checkString,			arginfo_v8js_checkstring,			ZEND_ACC_PUBLIC|ZEND_ACC_DEPRECATED)
 	PHP_ME(V8Js,	getPendingException,	arginfo_v8js_getpendingexception,	ZEND_ACC_PUBLIC)
 	PHP_ME(V8Js,	setModuleLoader,		arginfo_v8js_setmoduleloader,		ZEND_ACC_PUBLIC)
 	PHP_ME(V8Js,	registerExtension,		arginfo_v8js_registerextension,		ZEND_ACC_PUBLIC|ZEND_ACC_STATIC)