diff --git a/tgt-vvp/stmt_assign.c b/tgt-vvp/stmt_assign.c
index d729d8efc..44af922ca 100644
--- a/tgt-vvp/stmt_assign.c
+++ b/tgt-vvp/stmt_assign.c
@@ -1015,6 +1015,7 @@ static int show_stmt_assign_sig_cobject(ivl_statement_t net)
       ivl_lval_t lval = ivl_stmt_lval(net, 0);
       ivl_expr_t rval = ivl_stmt_rval(net);
       ivl_signal_t sig= ivl_lval_sig(lval);
+      unsigned lwid = ivl_lval_width(lval);
 
       int prop_idx = ivl_lval_property_idx(lval);
 
@@ -1031,8 +1032,8 @@ static int show_stmt_assign_sig_cobject(ivl_statement_t net)
 			fprintf(vvp_out, "    %%cast2;\n");
 
 		  fprintf(vvp_out, "    %%load/obj v%p_0;\n", sig);
-		  fprintf(vvp_out, "    %%store/prop/v %d; Store in bool property %s\n",
-			  prop_idx, ivl_type_prop_name(sig_type, prop_idx));
+		  fprintf(vvp_out, "    %%store/prop/v %d, %u; Store in bool property %s\n",
+			  prop_idx, lwid, ivl_type_prop_name(sig_type, prop_idx));
 		  fprintf(vvp_out, "    %%pop/obj 1, 0;\n");
 
 	    } else if (ivl_type_base(prop_type) == IVL_VT_LOGIC) {
@@ -1042,8 +1043,8 @@ static int show_stmt_assign_sig_cobject(ivl_statement_t net)
 		  draw_eval_vec4(rval, STUFF_OK_XZ);
 
 		  fprintf(vvp_out, "    %%load/obj v%p_0;\n", sig);
-		  fprintf(vvp_out, "    %%store/prop/v %d; Store in logic property %s\n",
-			  prop_idx, ivl_type_prop_name(sig_type, prop_idx));
+		  fprintf(vvp_out, "    %%store/prop/v %d, %u; Store in logic property %s\n",
+			  prop_idx, lwid, ivl_type_prop_name(sig_type, prop_idx));
 		  fprintf(vvp_out, "    %%pop/obj 1, 0;\n");
 
 	    } else if (ivl_type_base(prop_type) == IVL_VT_REAL) {
diff --git a/vvp/compile.cc b/vvp/compile.cc
index 6ad278995..3ccd97d68 100644
--- a/vvp/compile.cc
+++ b/vvp/compile.cc
@@ -270,10 +270,10 @@ static const struct opcode_table_s opcode_table[] = {
       { "%store/dar/vec4",of_STORE_DAR_VEC4,1,{OA_FUNC_PTR, OA_NONE, OA_NONE} },
       { "%store/obj",   of_STORE_OBJ,   1, {OA_FUNC_PTR,OA_NONE, OA_NONE} },
       { "%store/obja",  of_STORE_OBJA,  2, {OA_ARR_PTR, OA_BIT1, OA_NONE} },
-      { "%store/prop/obj",of_STORE_PROP_OBJ,1, {OA_NUMBER,  OA_NONE, OA_NONE} },
+      { "%store/prop/obj",of_STORE_PROP_OBJ,2, {OA_NUMBER,  OA_BIT1, OA_NONE} },
       { "%store/prop/r",  of_STORE_PROP_R,  1, {OA_NUMBER,  OA_NONE, OA_NONE} },
       { "%store/prop/str",of_STORE_PROP_STR,1, {OA_NUMBER,  OA_NONE, OA_NONE} },
-      { "%store/prop/v",  of_STORE_PROP_V,  1, {OA_NUMBER,  OA_NONE, OA_NONE} },
+      { "%store/prop/v",  of_STORE_PROP_V,  2, {OA_NUMBER,  OA_BIT1, OA_NONE} },
       { "%store/qb/r",   of_STORE_QB_R,    1, {OA_FUNC_PTR, OA_NONE, OA_NONE} },
       { "%store/qb/str", of_STORE_QB_STR,  1, {OA_FUNC_PTR, OA_NONE, OA_NONE} },
       { "%store/qf/r",   of_STORE_QF_R,    1, {OA_FUNC_PTR, OA_NONE, OA_NONE} },
diff --git a/vvp/opcodes.txt b/vvp/opcodes.txt
index b9b0da07c..078526c07 100644
--- a/vvp/opcodes.txt
+++ b/vvp/opcodes.txt
@@ -1230,10 +1230,10 @@ variable given by the label.
 
 See also %load/obj.
 
-* %store/prop/obj <index>
-* %store/prop/r <index>
-* %store/prop/str <index>
-* %store/prop/v <index>
+* %store/prop/obj <pid>, <idx>
+* %store/prop/r <pid>
+* %store/prop/str <pid>
+* %store/prop/v <pid>, <wid>
 
 The %store/prop/r pops a real value from the real stack and stores it
 into the the property number <pid> of a cobject in the top of the
@@ -1246,6 +1246,10 @@ is the index register to select an element. If the property is an
 array, this selects the element. If <idx> is 0, then use the value 0
 instead of index register zero. Use 0 for non-array properties.
 
+The %store/prop/v pops a vector from the vec4 stack and stores it into
+the property <pid> of the cobject in the top of the object stack. The
+vector is truncated to <wid> bits, and the cobject is NOT popped.
+
 * %store/real <var-label>
 * %store/reala <var-label>, <index>
 
diff --git a/vvp/vthread.cc b/vvp/vthread.cc
index 03b1bec13..2d90abdfc 100644
--- a/vvp/vthread.cc
+++ b/vvp/vthread.cc
@@ -2186,6 +2186,10 @@ bool of_CMPU(vthread_t thr, vvp_code_t cp)
       vvp_vector4_t rval = thr->pop_vec4();
       vvp_vector4_t lval = thr->pop_vec4();
 
+      if (rval.size() != lval.size()) {
+	    cerr << "VVP ERROR: %cmp/u operand width mismatch: lval=" << lval
+		 << ", rval=" << rval << endl;
+      }
       assert(rval.size() == lval.size());
       unsigned wid = lval.size();
 
@@ -5256,7 +5260,7 @@ bool of_PROP_STR(vthread_t thr, vvp_code_t cp)
 /*
  * %prop/v <pid>
  *
- * Load a property <id> from the cobject on the top of the stack into
+ * Load a property <pid> from the cobject on the top of the stack into
  * the vector space at <base>.
  */
 bool of_PROP_V(vthread_t thr, vvp_code_t cp)
@@ -6181,15 +6185,21 @@ bool of_STORE_PROP_STR(vthread_t thr, vvp_code_t cp)
 }
 
 /*
- * %store/prop/v <id>
+ * %store/prop/v <pid>, <wid>
  *
- * Store vector value into property <id> of cobject in the top of the stack.
+ * Store vector value into property <id> of cobject in the top of the
+ * stack. Do NOT pop the object stack.
  */
 bool of_STORE_PROP_V(vthread_t thr, vvp_code_t cp)
 {
       size_t pid = cp->number;
+      unsigned wid = cp->bit_idx[0];
+
       vvp_vector4_t val = thr->pop_vec4();
 
+      assert(val.size() >= wid);
+      val.resize(wid);
+
       vvp_object_t&obj = thr->peek_object();
       vvp_cobject*cobj = obj.peek<vvp_cobject>();
       assert(cobj);