1 files changed, 2 insertions, 0 deletions
diff --git a/JavaScriptCore/wtf/PassRefPtr.h b/JavaScriptCore/wtf/PassRefPtr.h
index 052d6e2..b179cef 100644
--- a/JavaScriptCore/wtf/PassRefPtr.h
+++ b/JavaScriptCore/wtf/PassRefPtr.h
@@ -22,6 +22,7 @@
 #define WTF_PassRefPtr_h
 
 #include "AlwaysInline.h"
+#include "NullPtr.h"
 
 namespace WTF {
 
@@ -90,6 +91,7 @@ namespace WTF {
 
         PassRefPtr& operator=(T*);
         PassRefPtr& operator=(const PassRefPtr&);
+        PassRefPtr& operator=(std::nullptr_t) { clear(); return *this; }
         template<typename U> PassRefPtr& operator=(const PassRefPtr<U>&);
         template<typename U> PassRefPtr& operator=(const RefPtr<U>&);