diff --git a/test/CFrontend/2004-01-01-UnknownInitSize.c b/test/CFrontend/2004-01-01-UnknownInitSize.c
new file mode 100644
index 00000000000..076c54b39f9
--- /dev/null
+++ b/test/CFrontend/2004-01-01-UnknownInitSize.c
@@ -0,0 +1,12 @@
+/*
+ * This regression test ensures that the C front end can compile initializers
+ * even when it cannot determine the size (as below).
+ */
+struct one
+{
+  int a;
+  int values [];
+};
+
+struct one hobbit = {5, {1, 2, 3}};
+