diff --git a/shell/browser/osr/osr_web_contents_view.h b/shell/browser/osr/osr_web_contents_view.h
index df110df90443..85c68892b898 100644
--- a/shell/browser/osr/osr_web_contents_view.h
+++ b/shell/browser/osr/osr_web_contents_view.h
@@ -109,7 +109,7 @@ class OffScreenWebContentsView : public content::WebContentsView,
   raw_ptr<content::WebContents> web_contents_ = nullptr;
 
 #if BUILDFLAG(IS_MAC)
-  RAW_PTR_EXCLUSION OffScreenView* offScreenView_;
+  RAW_PTR_EXCLUSION OffScreenView* offScreenView_ = nullptr;
 #endif
 };