diff --git a/test/CFrontend/2003-11-20-UnionBitfield.c b/test/CFrontend/2003-11-20-UnionBitfield.c
new file mode 100644
index 0000000..1bbf26f
--- /dev/null
+++ b/test/CFrontend/2003-11-20-UnionBitfield.c
@@ -0,0 +1,10 @@
+struct printf_spec {
+  unsigned int minus_flag:1;
+  char converter;
+};
+
+void parse_doprnt_spec () {
+  struct printf_spec spec;
+  spec.minus_flag = 1;
+}
+