Added missing define.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/tb/tb_chacha_core.v b/src/tb/tb_chacha_core.v
index a36899f..1e729d2 100644
--- a/src/tb/tb_chacha_core.v
+++ b/src/tb/tb_chacha_core.v
@@ -96,6 +96,7 @@ module tb_chacha_core();
   wire           tb_core_ready;
   reg [0 : 511]  tb_core_data_in;
   wire [0 : 511] tb_core_data_out;
+  wire           tb_core_data_out_valid;
 
   reg            display_cycle_ctr;
   reg            display_ctrl_and_ctrs;