diff --git a/test/ThriftTest.thrift b/test/ThriftTest.thrift
index be000b6..500f0ea 100644
--- a/test/ThriftTest.thrift
+++ b/test/ThriftTest.thrift
@@ -68,6 +68,8 @@
   2: i32 type
 }
 
+typedef map<string,Bonk> MapType
+
 struct Bools {
   1: bool im_true,
   2: bool im_false,