diff --git a/swig/comedi.i b/swig/comedi.i
index 5da6160..d9df4cb 100644
--- a/swig/comedi.i
+++ b/swig/comedi.i
@@ -64,19 +64,7 @@ static unsigned int cr_aref(unsigned int a){
 %include "comedi.h"
 %include "comedilib.h"
 
-/* These typedefs work around limitations in SWIG's array_class().
- * Without them, you get errors like:
- * >>> import comedi
- * >>> cmd = comedi.comedi_cmd_struct()
- * >>> data = comedi.sampl_array(3)
- * >>> cmd.data = data
- * Traceback (most recent call last):
- *   ...
- * TypeError: in method 'comedi_cmd_struct_data_set', argument 2 of type 'sampl_t *'
- */
-typedef unsigned short sampl_array;
-typedef unsigned int lsampl_array;
-
 %array_class(unsigned int, chanlist);
 %array_class(sampl_t, sampl_array);
 %array_class(lsampl_t, lsampl_array);
+%array_class(comedi_insn, insn_array);