diff --git a/atom/browser/api/atom_api_web_contents.cc b/atom/browser/api/atom_api_web_contents.cc
index f05b70c50f49..b0927ee57298 100644
--- a/atom/browser/api/atom_api_web_contents.cc
+++ b/atom/browser/api/atom_api_web_contents.cc
@@ -1095,7 +1095,7 @@ void WebContents::StopFindInPage(content::StopFindAction action) {
 }
 
 void WebContents::ShowDefinitionForSelection() {
-#if defined(OS_WIN)
+#if defined(OS_MACOSX)
   const auto view = web_contents()->GetRenderWidgetHostView();
   if (view)
     view->ShowDefinitionForSelection();