diff --git a/test/Sema/anonymous-struct-union.c b/test/Sema/anonymous-struct-union.c
index b288f62..4e699ab 100644
--- a/test/Sema/anonymous-struct-union.c
+++ b/test/Sema/anonymous-struct-union.c
@@ -79,3 +79,11 @@
 
 // <rdar://problem/6481130>
 typedef struct { }; // expected-error{{declaration does not declare anything}}
+
+// PR3675
+struct s1 {
+  int f0; // expected-note{{previous declaration is here}}
+  union {
+    int f0; // expected-error{{member of anonymous union redeclares 'f0'}}
+  };
+};