diff --git a/library/axi_spdif_tx/axi_spdif_tx.vhd b/library/axi_spdif_tx/axi_spdif_tx.vhd
index c5aed5a84..3834c8aad 100644
--- a/library/axi_spdif_tx/axi_spdif_tx.vhd
+++ b/library/axi_spdif_tx/axi_spdif_tx.vhd
@@ -309,7 +309,7 @@ begin
 		end if;
 	end process;
 
-	process (rd_addr)
+	process (rd_addr, config_reg, chstatus_reg)
 	begin
 		case rd_addr is
 			when 0 => rd_data <= config_reg;