diff --git a/vvp/reduce.cc b/vvp/reduce.cc
index 0dc3ed87e..1b4ae22f3 100644
--- a/vvp/reduce.cc
+++ b/vvp/reduce.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #ifdef HAVE_CVS_IDENT
-#ident "$Id: reduce.cc,v 1.3 2006/05/01 18:44:08 steve Exp $"
+#ident "$Id: reduce.cc,v 1.4 2006/05/01 20:47:03 steve Exp $"
 #endif
 
 # include  "compile.h"
@@ -134,7 +134,7 @@ void vvp_reduce_nand::recv_vec4(vvp_net_ptr_t prt, const vvp_vector4_t&bit)
       for (unsigned idx = 0 ;  idx < bit.size() ;  idx += 1)
 	    res = res & bit.value(idx);
 
-      vvp_vector4_t rv (1, res);
+      vvp_vector4_t rv (1, ~res);
       vvp_send_vec4(prt.ptr()->out, rv);
 }
 
@@ -241,6 +241,9 @@ void compile_reduce_xnor(char*label, struct symb_s arg)
 
 /*
  * $Log: reduce.cc,v $
+ * Revision 1.4  2006/05/01 20:47:03  steve
+ *  Forgot to invert nand output.
+ *
  * Revision 1.3  2006/05/01 18:44:08  steve
  *  Reduce steps to make logic output.
  *