diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index ad46bcdca7e4..404593452c23 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -1616,7 +1616,8 @@ QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray,
 
     Canonical = getFunctionType(getCanonicalType(ResultTy),
                                 CanonicalArgs.data(), NumArgs,
-                                isVariadic, TypeQuals, NoReturn);
+                                isVariadic, TypeQuals, false,
+                                false, 0, 0, NoReturn);
 
     // Get the new insert position for the node we care about.
     FunctionProtoType *NewIP =
diff --git a/clang/test/Sema/attr-noreturn.c b/clang/test/Sema/attr-noreturn.c
index 2970a4827ef9..f649b91d9cf1 100644
--- a/clang/test/Sema/attr-noreturn.c
+++ b/clang/test/Sema/attr-noreturn.c
@@ -25,3 +25,11 @@ void f4() {
   return;  // expected-warning {{function 'f4' declared 'noreturn' should not return}}
 }
 
+// PR4685
+extern void f5 (unsigned long) __attribute__ ((__noreturn__));
+
+void
+f5 (unsigned long size)
+{
+  
+}
\ No newline at end of file