diff --git a/RCUSCC/RCUSCC/RCUSCC.py b/RCUSCC/RCUSCC/RCUSCC.py
index e4bca80879b8a442ae4fccfb4804e5981fa4f451..0c7d0e0f98e2e6810ad4e753693c9f6e7703e222 100644
--- a/RCUSCC/RCUSCC/RCUSCC.py
+++ b/RCUSCC/RCUSCC/RCUSCC.py
@@ -166,7 +166,7 @@ class RCUSCC(Device):
     )
 
     RCU_monitor_rate_RW = attribute(
-        dtype='DevULong64',
+        dtype='DevDouble',
     )