diff --git a/sim.i b/sim.i
index c0d6a1c..ea58379 100644
--- a/sim.i
+++ b/sim.i
@@ -3,3 +3,5 @@
 #include "pop-simple.hpp"
 %}
 %include "pop-simple.hpp"
+%include <std_vector.i>
+%template(IntVector) std::vector<int>;