diff --git a/pcie_wb.sdc b/pcie_wb.sdc
new file mode 100644
index 0000000000000000000000000000000000000000..5704e563b53e92fdfab90acf827cf6ca76dba022
--- /dev/null
+++ b/pcie_wb.sdc
@@ -0,0 +1,4 @@
+create_clock -period "125 MHz" -name {pcie_clk125_i} {pcie_clk125_i}
+create_clock -period "100 MHz" -name {pcie_refclk_i} {pcie_refclk_i}
+derive_pll_clocks
+derive_clock_uncertainty
\ No newline at end of file