diff --git a/vvp/vpi_vthr_vector.cc b/vvp/vpi_vthr_vector.cc
index edef159dc..d1e87fbe9 100644
--- a/vvp/vpi_vthr_vector.cc
+++ b/vvp/vpi_vthr_vector.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2009 Stephen Williams (steve@icarus.com)
+ * Copyright (c) 2001-2010 Stephen Williams (steve@icarus.com)
  * Copyright (c) 2001 Stephan Boettcher <stephan@nevis.columbia.edu>
  *
  *    This source code is free software; you can redistribute it
@@ -109,7 +109,8 @@ static int vthr_vec_get(int code, vpiHandle ref)
 static char* vthr_vec_get_str(int code, vpiHandle ref)
 {
       assert((ref->vpi_type->type_code==vpiNet)
-	     || (ref->vpi_type->type_code==vpiReg));
+	     || (ref->vpi_type->type_code==vpiReg)
+	     || (ref->vpi_type->type_code==vpiConstant));
 
       struct __vpiVThrVec*rfp = (struct __vpiVThrVec*)ref;
 
@@ -319,6 +320,8 @@ static void vthr_vec_get_value(vpiHandle ref, s_vpi_value*vp)
 	    }
 	    break;
 
+	  case vpiObjTypeVal:
+	    vp->format = vpiVectorVal; 
 	  case vpiVectorVal:
 	    vp->value.vector = (s_vpi_vecval*)
 		  need_result_buf((wid+31)/32*sizeof(s_vpi_vecval), RBUF_VAL);
diff --git a/vvp/vthread.cc b/vvp/vthread.cc
index a93eb4dbf..c9ce00092 100644
--- a/vvp/vthread.cc
+++ b/vvp/vthread.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2009 Stephen Williams (steve@icarus.com)
+ * Copyright (c) 2001-2010 Stephen Williams (steve@icarus.com)
  *
  *    This source code is free software; you can redistribute it
  *    and/or modify it in source code form under the terms of the GNU
@@ -167,7 +167,8 @@ static inline void thr_clr_bit_(struct vthread_s*thr, unsigned addr)
 
 vvp_bit4_t vthread_get_bit(struct vthread_s*thr, unsigned addr)
 {
-      return thr_get_bit(thr, addr);
+      if (vpi_mode_flag == VPI_MODE_COMPILETF) return BIT4_X;
+      else return thr_get_bit(thr, addr);
 }
 
 void vthread_put_bit(struct vthread_s*thr, unsigned addr, vvp_bit4_t bit)