diff --git a/js/src/jsfriendapi.cpp b/js/src/jsfriendapi.cpp
index e3fba17be2d5e..2041c801adeae 100644
--- a/js/src/jsfriendapi.cpp
+++ b/js/src/jsfriendapi.cpp
@@ -2748,6 +2748,127 @@ FUNCTION_EXTENDED
 ;
 }
 JS_PUBLIC_API
+JSFunction
+*
+js
+:
+:
+NewFunctionByIdWithReservedAndProto
+(
+JSContext
+*
+cx
+JSNative
+native
+HandleObject
+proto
+unsigned
+nargs
+unsigned
+flags
+jsid
+id
+)
+{
+MOZ_ASSERT
+(
+id
+.
+isAtom
+(
+)
+)
+;
+MOZ_ASSERT
+(
+!
+cx
+-
+>
+zone
+(
+)
+-
+>
+isAtomsZone
+(
+)
+)
+;
+MOZ_ASSERT
+(
+native
+)
+;
+CHECK_THREAD
+(
+cx
+)
+;
+cx
+-
+>
+check
+(
+id
+)
+;
+Rooted
+<
+JSAtom
+*
+>
+atom
+(
+cx
+id
+.
+toAtom
+(
+)
+)
+;
+FunctionFlags
+funflags
+=
+(
+flags
+&
+JSFUN_CONSTRUCTOR
+)
+?
+FunctionFlags
+:
+:
+NATIVE_CTOR
+:
+FunctionFlags
+:
+:
+NATIVE_FUN
+;
+return
+NewFunctionWithProto
+(
+cx
+native
+nargs
+funflags
+nullptr
+atom
+proto
+gc
+:
+:
+AllocKind
+:
+:
+FUNCTION_EXTENDED
+TenuredObject
+)
+;
+}
+JS_PUBLIC_API
 const
 Value
 &
diff --git a/js/src/jsfriendapi.h b/js/src/jsfriendapi.h
index 5d0606486f40f..e602d9d5de209 100644
--- a/js/src/jsfriendapi.h
+++ b/js/src/jsfriendapi.h
@@ -1358,6 +1358,33 @@ id
 )
 ;
 JS_PUBLIC_API
+JSFunction
+*
+NewFunctionByIdWithReservedAndProto
+(
+JSContext
+*
+cx
+JSNative
+native
+JS
+:
+:
+Handle
+<
+JSObject
+*
+>
+proto
+unsigned
+nargs
+unsigned
+flags
+jsid
+id
+)
+;
+JS_PUBLIC_API
 const
 JS
 :