diff --git a/debye_bec/devices/pilatus/pilatus.py b/debye_bec/devices/pilatus/pilatus.py
index 72c25a4..958b4d3 100644
--- a/debye_bec/devices/pilatus/pilatus.py
+++ b/debye_bec/devices/pilatus/pilatus.py
@@ -96,6 +96,7 @@ class Pilatus(PSIDeviceBase, ADBase):
         EpicsSignal,
         read_pv="X01DA-OP-MO1:BRAGG:xrd_trig_req",
         write_pv="X01DA-OP-MO1:BRAGG:xrd_trig_req",
+        add_prefix=("a",),
         kind=Kind.omitted,
         doc="Trigger PV from MO1 Bragg",
     )
@@ -103,6 +104,7 @@ class Pilatus(PSIDeviceBase, ADBase):
         EpicsSignal,
         read_pv="X01DA-OP-MO1:BRAGG:xrd_trig_src_ENUM_RBV",
         write_pv="X01DA-OP-MO1:BRAGG:xrd_trig_src_ENUM",
+        add_prefix=("a",),
         kind=Kind.omitted,
         doc="Trigger Source; PV, 0 : EPICS, 1 : INPOS",
     )
@@ -110,6 +112,7 @@ class Pilatus(PSIDeviceBase, ADBase):
         EpicsSignal,
         read_pv="X01DA-OP-MO1:BRAGG:xrd_trig_mode_ENUM_RBV",
         write_pv="X01DA-OP-MO1:BRAGG:xrd_trig_mode_ENUM",
+        add_prefix=("a",),
         kind=Kind.omitted,
         doc="Trigger Mode; 0 : PULSE, 1 : CONDITION",
     )
@@ -117,6 +120,7 @@ class Pilatus(PSIDeviceBase, ADBase):
         EpicsSignal,
         read_pv="X01DA-OP-MO1:BRAGG:xrd_trig_len_RBV",
         write_pv="X01DA-OP-MO1:BRAGG:xrd_trig_len",
+        add_prefix=("a",),
         kind=Kind.omitted,
         doc="Trigger Pulse Length in seconds",
     )