diff --git a/test/CodeGenCXX/conversion-operator-base.cpp b/test/CodeGenCXX/conversion-operator-base.cpp
new file mode 100644
index 0000000000..49796d08a8
--- /dev/null
+++ b/test/CodeGenCXX/conversion-operator-base.cpp
@@ -0,0 +1,7 @@
+// RUN: clang-cc -emit-llvm-only %s -verify
+// PR5730
+
+struct A { operator int(); float y; };
+struct B : A { double z; };
+void a() { switch(B()) {} }
+