diff --git a/test/Parser/MicrosoftExtensions.c b/test/Parser/MicrosoftExtensions.c
index 0b2733e..4a52e8b 100644
--- a/test/Parser/MicrosoftExtensions.c
+++ b/test/Parser/MicrosoftExtensions.c
@@ -34,3 +34,4 @@
 #define FOO(x) #@x
 char x = FOO(a);
 
+typedef enum E { e1 };