diff --git a/libs/typesystem.h b/libs/typesystem.h
index f16d4199..67c0680f 100644
--- a/libs/typesystem.h
+++ b/libs/typesystem.h
@@ -24,6 +24,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 
 #include <list>
+#include <vector>
 #include "generic/callback.h"
 #include "generic/static.h"