diff --git a/SDP/SDP/SDP.py b/SDP/SDP/SDP.py
index b4a18e6f7884430273d8bd8c99159da72417d353..c096a0082a507e24e5bfe84961a0a77a79bcbd48 100644
--- a/SDP/SDP/SDP.py
+++ b/SDP/SDP/SDP.py
@@ -101,13 +101,13 @@ class SDP(Device):
     )
 
     fpga_scrap_RW = attribute(
-        dtype = ('DevUInt64',),
+        dtype = ('DevULong64',),
         max_dim_x = 2048,
         access=AttrWriteType.READ_WRITE,
     )
 
     fpga_scrap_R = attribute(
-        dtype = ('DevUInt64',),
+        dtype = ('DevULong64',),
         max_dim_x = 2048,
     )