diff --git a/SDP/SDP/SDP.py b/SDP/SDP/SDP.py
index 1bf3ad45280fbf5e0b6c9d28e8e2bfa644f944aa..24bdaf239870f128e0cecb6940aaa6d85e763b65 100644
--- a/SDP/SDP/SDP.py
+++ b/SDP/SDP/SDP.py
@@ -101,13 +101,13 @@ class SDP(Device):
     )
 
     fpga_scrap_RW = attribute(
-        dtype = ('DevULong64',),
+        dtype = ('DevLong',),
         max_dim_x = 2048,
         access=AttrWriteType.READ_WRITE,
     )
 
     fpga_scrap_R = attribute(
-        dtype = ('DevULong64',),
+        dtype = ('DevLong',),
         max_dim_x = 2048,
     )