diff --git a/t/src/extend_vtable.t b/t/src/extend_vtable.t
index c6050c84ad..f7abe62e57 100644
--- a/t/src/extend_vtable.t
+++ b/t/src/extend_vtable.t
@@ -283,6 +283,7 @@ Done!
 OUTPUT
 
 extend_vtable_output_is(<<'CODE', <<'OUTPUT', "Parrot_PMC_get_string_keyed_str");
+    string = createstring(interp,"foo");
     string = Parrot_PMC_get_string_keyed_str(interp, hash, string);
     Parrot_printf(interp,"%Ss\n", string);
 CODE