diff --git a/tests/commonjs_fatal_error.phpt b/tests/commonjs_fatal_error.phpt
new file mode 100644
index 0000000..f246adf
--- /dev/null
+++ b/tests/commonjs_fatal_error.phpt
@@ -0,0 +1,17 @@
+--TEST--
+Test V8Js::setModuleLoader : Handle fatal errors gracefully
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+$v8 = new V8Js();
+
+$v8->setModuleLoader(function() {
+    trigger_error('some fatal error', E_USER_ERROR);
+});
+
+$v8->executeString(' require("foo"); ');
+?>
+===EOF===
+--EXPECTF--
+Fatal error: some fatal error in %s%ecommonjs_fatal_error.php on line 5
diff --git a/v8js_methods.cc b/v8js_methods.cc
index 889a707..afa0cd8 100644
--- a/v8js_methods.cc
+++ b/v8js_methods.cc
@@ -257,13 +257,34 @@ V8JS_METHOD(require)
 	MAKE_STD_ZVAL(normalised_path_zend);
 	ZVAL_STRING(normalised_path_zend, normalised_module_id, 1);
 
-	zval **params[1] = {&normalised_path_zend};
-	if (FAILURE == call_user_function_ex(EG(function_table), NULL, c->module_loader, &module_code, 1, params, 0, NULL TSRMLS_CC)) {
+	int call_result;
+
+	zend_try {
+		{
+			isolate->Exit();
+			v8::Unlocker unlocker(isolate);
+
+			zval **params[1] = {&normalised_path_zend};
+			call_result = call_user_function_ex(EG(function_table), NULL, c->module_loader, &module_code, 1, params, 0, NULL TSRMLS_CC);
+		}
+
+		isolate->Enter();
+
+		if (call_result == FAILURE) {
+			info.GetReturnValue().Set(isolate->ThrowException(V8JS_SYM("Module loader callback failed")));
+		}
+	}
+	zend_catch {
+		v8js_terminate_execution(isolate);
+		V8JSG(fatal_error_abort) = 1;
+		call_result = FAILURE;
+	}
+	zend_end_try();
+
+	if (call_result == FAILURE) {
 		zval_ptr_dtor(&normalised_path_zend);
 		efree(normalised_module_id);
 		efree(normalised_path);
-
-		info.GetReturnValue().Set(isolate->ThrowException(V8JS_SYM("Module loader callback failed")));
 		return;
 	}
 	zval_ptr_dtor(&normalised_path_zend);