--- a/src/interp-core/jit-typeinfo.cc
+++ b/src/interp-core/jit-typeinfo.cc
@@ -1159,6 +1159,10 @@
   fn.add_mapping (engine, &octave_jit_release_matrix);
   release_fn.add_overload (fn);
 
+  // copy
+  copy_fn.stash_name ("copy");
+  copy_fn.add_overload (create_identity (scalar));
+
   // now for binary scalar operations
   add_binary_op (scalar, octave_value::op_add, llvm::Instruction::FAdd);
   add_binary_op (scalar, octave_value::op_sub, llvm::Instruction::FSub);

--- a/src/interp-core/jit-typeinfo.h
+++ b/src/interp-core/jit-typeinfo.h
@@ -498,6 +498,11 @@
     return instance->release_fn.overload (type);
   }
 
+  static const jit_operation& copy (void)
+  {
+    return instance->copy_fn;
+  }
+
   static const jit_operation& print_value (void)
   {
     return instance->print_fn;
@@ -751,6 +756,7 @@
   std::vector<jit_operation> unary_ops;
   jit_operation grab_fn;
   jit_operation release_fn;
+  jit_operation copy_fn;
   jit_operation print_fn;
   jit_operation for_init_fn;
   jit_operation for_check_fn;

--- a/src/interp-core/pt-jit.cc
+++ b/src/interp-core/pt-jit.cc
@@ -592,9 +592,9 @@
 
   if (etype == octave_value::op_incr || etype == octave_value::op_decr)
     {
-      // FIXME: Somehow copy operandv
-      // do_assign (operand, operandv);
-      throw jit_fail_exception ("Postfix ++ and -- not yet supported");
+      jit_value *ret = create_checked (&jit_typeinfo::copy, operandv);
+      do_assign (operand, result);
+      result = ret;
     }
 }
 
@@ -1991,5 +1991,12 @@
 %! endwhile
 %! assert (i == 10);
 %! assert (a == 10);
+%!test
+%! i = 0;
+%! while i < 10
+%!   a = i++;
+%! endwhile
+%! assert (i == 10);
+%! assert (a == 9);
 
 */