diff --git a/router/router_types.vhdl b/router/router_types.vhdl
index dc1122c..e98b5c0 100644
--- a/router/router_types.vhdl
+++ b/router/router_types.vhdl
@@ -47,8 +47,8 @@ package router_types is
     end record;
 
     type t_addr is record
-        x :   std_logic_vector(DEST_ADDR_SIZE-1 downto 1); -- last bit is always '-' for all routers
-        y :   std_logic_vector(DEST_ADDR_SIZE-1 downto 1);
+        x :   std_logic_vector(DEST_ADDR_SIZE-1 downto 0);
+        y :   std_logic_vector(DEST_ADDR_SIZE-1 downto 0);
     end record;
 
     type t_pos_addr is record
diff --git a/synthesis/cmd/do_synth_arbiter.tcl b/synthesis/cmd/do_synth_arbiter.tcl
index 2ed5f1b..36f6513 100644
--- a/synthesis/cmd/do_synth_arbiter.tcl
+++ b/synthesis/cmd/do_synth_arbiter.tcl
@@ -7,6 +7,19 @@ analyze -library WORK -format vhdl {../router/routing_functions.vhdl}
 analyze -library WORK -format vhdl {../router/arbiter.vhdl}
 elaborate arbiter -library WORK -parameters "level = $level, num_paths_up = $npu, num_paths_down = $npd"
 check_design
+
+create_clock [get_ports clk]  -period 8.0  -waveform {0 4} -name clk
+
+set_clock_uncertainty 0.025  -setup [get_clocks clk]
+set_clock_uncertainty 0.025  -hold [get_clocks clk]
+set_clock_transition -fall 0.04 [get_clocks clk]
+set_clock_transition -rise 0.04 [get_clocks clk]
+
+set_clock_latency -max -source 0.1 [get_clocks clk] 
+
+set_input_delay -max -clock clk  0.05 [get_ports {rout_pos packets valid_data avai_paths}]
+set_output_delay -max -clock clk  0.05 [all_outputs]
+
 check_timing
 compile
 report_area > reports/arbiter-$level-spl_synth.area
diff --git a/synthesis/cmd/do_synth_router_lvl1.sh b/synthesis/cmd/do_synth_router_lvl1.sh
index b070bd0..6d6b844 100644
--- a/synthesis/cmd/do_synth_router_lvl1.sh
+++ b/synthesis/cmd/do_synth_router_lvl1.sh
@@ -1 +1 @@
-LEVEL=1 NPU=2 NPD=1 CHIP_X=00001 CHIP_Y=00001 dc_shell -x "source cmd/do_synth_router.tcl; quit" | tee -a log/synthesis.log
+LEVEL=1 NPU=2 NPD=1 CHIP_X=00001 CHIP_Y=00001 dc_shell -x "source cmd/do_synth_arbiter.tcl; quit" | tee -a log/synthesis.log
\ No newline at end of file