diff --git a/src/ophyd_epics_devices/panda.py b/src/ophyd_epics_devices/panda.py
index 59e33ff..a628775 100644
--- a/src/ophyd_epics_devices/panda.py
+++ b/src/ophyd_epics_devices/panda.py
@@ -282,7 +282,7 @@ async def connect(self, sim=False) -> None:
         #   both 'pcap' and 'pcap1' are in PVI, remove 'pcap1'.
         pvi_keys = set(pvi.keys())
         for k in pvi_keys:
-            kn = re.sub("\d*$", "", k)
+            kn = re.sub(r"\d*$", "", k)
             if kn and k != kn and kn in pvi_keys:
                 del pvi[k]