diff --git a/openfpga_flow/vpr_arch/k4_frac_N4_tileable_fracff_40nm.xml b/openfpga_flow/vpr_arch/k4_frac_N4_tileable_fracff_40nm.xml
index 19447dd7e..ad21e6f59 100644
--- a/openfpga_flow/vpr_arch/k4_frac_N4_tileable_fracff_40nm.xml
+++ b/openfpga_flow/vpr_arch/k4_frac_N4_tileable_fracff_40nm.xml
@@ -107,7 +107,12 @@
-
+
+
+
+ clb.reset clb.clk clb.O[4:7] clb.I[6:11]
+ clb.O[0:3] clb.I[0:5]
+