diff --git a/test/TableGen/AnonDefinitionOnDemand.td b/test/TableGen/AnonDefinitionOnDemand.td
new file mode 100644
index 00000000000..d567fc807e8
--- /dev/null
+++ b/test/TableGen/AnonDefinitionOnDemand.td
@@ -0,0 +1,12 @@
+// RUN: tblgen < %s
+
+class foo<int X> { int THEVAL = X; }
+def foo_imp : foo<1>;
+
+def x {
+  foo Y = foo_imp;    // This works.
+}
+
+def X {
+  foo Y = foo<1>;     // This should work too, synthesizing a new foo<1>.
+}