diff --git a/tgt-vvp/stmt_assign.c b/tgt-vvp/stmt_assign.c
index 65ccc831c..754722646 100644
--- a/tgt-vvp/stmt_assign.c
+++ b/tgt-vvp/stmt_assign.c
@@ -161,6 +161,7 @@ static void get_vec_from_lval_slice(ivl_lval_t lval, struct vec_slice_info*slice
 	    if (use_word < ivl_signal_array_count(sig)) {
 		  fprintf(vvp_out, "    %%ix/load 3, %lu, 0;\n",
 			  use_word);
+		  fprintf(vvp_out, "    %%flag_set/imm 4, 0;\n");
 		  fprintf(vvp_out, "    %%load/vec4a v%p, 3;\n", sig);
 	    } else {
 		  assert(wid <= 32);