diff --git a/sonic_platform_base/sonic_pcie/pcie_common.py b/sonic_platform_base/sonic_pcie/pcie_common.py
index 127c614cd..35b708856 100644
--- a/sonic_platform_base/sonic_pcie/pcie_common.py
+++ b/sonic_platform_base/sonic_pcie/pcie_common.py
@@ -37,8 +37,8 @@ def load_config_file(self):
     def get_pcie_device(self):
         pciDict = {}
         pciList = []
-        p1 = "^(\w+):(\w+)\.(\w)\s(.*)\s*\(*.*\)*"
-        p2 = "^.*:.*:.*:(\w+)\s*\(*.*\)*"
+        p1 = r"^(\w+):(\w+)\.(\w)\s(.*)\s*\(*.*\)*"
+        p2 = r"^.*:.*:.*:(\w+)\s*\(*.*\)*"
         command1 = ["sudo", "lspci"]
         command2 = ["sudo", "lspci", "-n"]
         # run command 1