diff --git a/swig/pointer_manipulation.i b/swig/pointer_manipulation.i
index d7e7b31e3..14405554f 100644
--- a/swig/pointer_manipulation.i
+++ b/swig/pointer_manipulation.i
@@ -21,6 +21,7 @@
 %pointer_functions(float, floatp)
 %pointer_functions(int64_t, int64_tp)
 %pointer_functions(int32_t, int32_tp)
+%pointer_functions(size_t, size_tp)
 
 %pointer_cast(int64_t *, long *, int64_t_to_long_ptr)
 %pointer_cast(int64_t *, double *, int64_t_to_double_ptr)