diff --git a/atom/common/platform_util_linux.cc b/atom/common/platform_util_linux.cc
index a8940fd68f..63488fe7df 100644
--- a/atom/common/platform_util_linux.cc
+++ b/atom/common/platform_util_linux.cc
@@ -93,6 +93,7 @@ void OpenExternal(const GURL& url, bool activate,
                   const OpenExternalCallback& callback) {
   // TODO(gabriel): Implement async open if callback is specified
   bool opened = OpenExternal(url, activate);
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
   if (!opened) {
     callback.Run(v8::Exception::Error(
       v8::String::NewFromUtf8(isolate, "Failed to open")));
diff --git a/atom/common/platform_util_win.cc b/atom/common/platform_util_win.cc
index 34cc2b1835..6c59699a83 100644
--- a/atom/common/platform_util_win.cc
+++ b/atom/common/platform_util_win.cc
@@ -320,6 +320,7 @@ void OpenExternal(const base::string16& url, bool activate,
                   const OpenExternalCallback& callback) {
   // TODO(gabriel): Implement async open if callback is specified
   bool opened = OpenExternal(url, activate);
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
   if (!opened) {
     callback.Run(v8::Exception::Error(
       v8::String::NewFromUtf8(isolate, "Failed to open")));