diff --git a/design_dump.cc b/design_dump.cc
index 7b91c5bc4..471ca32f3 100644
--- a/design_dump.cc
+++ b/design_dump.cc
@@ -1543,6 +1543,15 @@ void NetEUnary::dump(ostream&o) const
 	  case 'X':
 	    o << "~^";
 	    break;
+          case 'I':
+	    o << "++";
+	    break;
+          case 'D':
+	    o << "--";
+	    break;
+          case 'i':
+          case 'd':
+	    break;
 	  default:
 	    o << op_;
 	    break;
@@ -1550,6 +1559,14 @@ void NetEUnary::dump(ostream&o) const
       o << "(";
       expr_->dump(o);
       o << ")";
+      switch (op_) {
+          case 'i':
+	    o << "++";
+	    break;
+          case 'd':
+	    o << "--";
+	    break;
+      }
 }
 
 void Design::dump(ostream&o) const
diff --git a/netlist.h b/netlist.h
index dca69e0e7..cc000ecd4 100644
--- a/netlist.h
+++ b/netlist.h
@@ -3818,9 +3818,13 @@ class NetETernary  : public NetExpr {
  *   N  -- Reduction NOR (~|)
  *   X  -- Reduction NXOR (~^ or ^~)
  *   m  -- abs(x)  (i.e. "magnitude")
- *   i  -- Cast from real to integer (vector)
+ *   v  -- Cast from real to integer (vector)
  *   2  -- Cast from real or logic (vector) to bool (vector)
  *   r  -- Cast from integer (vector) to real
+ *   i  -- post-increment
+ *   I  -- pre-increment
+ *   d  -- post-decrement
+ *   D  -- pre-decrement
  */
 class NetEUnary  : public NetExpr {