diff --git a/components/tlu/firmware/hdl/T0_Shutter_Iface_rtl.vhd b/components/tlu/firmware/hdl/T0_Shutter_Iface_rtl.vhd
index d3a3ca8fa56d4f528fdb982330ec2b8815db22c6..26a3c63724a27342089270930a3ea71afff4d41a 100644
--- a/components/tlu/firmware/hdl/T0_Shutter_Iface_rtl.vhd
+++ b/components/tlu/firmware/hdl/T0_Shutter_Iface_rtl.vhd
@@ -80,8 +80,7 @@ ARCHITECTURE rtl OF T0_Shutter_Iface IS
 
   signal s_enable_sequence : std_logic ; --! take high to enable sequence
   signal s_enable_internal_cycle : std_logic ; --! take high to enable internal sequence
-  -- signal s_internal_cycle_length : STD_LOGIC_VECTOR(g_IPBUS_WIDTH-1 downto 0); --! Length of internally generated strobe cycle.
-
+  signal s_T0_ipbus : std_logic; --! T0 synchronization signal on IPBus clock domain.
 
   constant c_NUM_CTRL_REGS  : integer := 8;
   constant c_NUM_STAT_REGS  : integer := 1;
diff --git a/projects/TLU_v1e/firmware/cfg/tlu_1e.dep b/projects/TLU_v1e/firmware/cfg/tlu_1e.dep
index 67d503b08496a7681635f94a0a300120611c95ec..53e8dcc64f89713d3568df038301edec03622471 100644
--- a/projects/TLU_v1e/firmware/cfg/tlu_1e.dep
+++ b/projects/TLU_v1e/firmware/cfg/tlu_1e.dep
@@ -4,6 +4,9 @@
 addrtab -t TLUaddrmap.xml
 
 src -c ipbus-firmware:components/ipbus_slaves ipbus_ctrlreg_v.vhd
+src -c ipbus-firmware:components/ipbus_slaves ipbus_syncreg_v.vhd
+src -c ipbus-firmware:components/ipbus_slaves syncreg_w.vhd
+src -c ipbus-firmware:components/ipbus_slaves syncreg_r.vhd
 src -c ipbus-firmware:components/ipbus_core ipbus_fabric_sel.vhd
 src ipbus_decode_top.vhd