diff --git a/ophyd/signal.py b/ophyd/signal.py
index f69e2f834..f70dee5f7 100644
--- a/ophyd/signal.py
+++ b/ophyd/signal.py
@@ -2056,7 +2056,7 @@ def put(
             use_complete = self._put_complete
 
         if not self.write_access:
-            raise ReadOnlyError("No write access to underlying EPICS PV")
+            raise ReadOnlyError(f"No write access to underlying EPICS PV : {self.name}")
 
         self.control_layer_log.debug(
             "_write_pv.put(value=%s, use_complete=%s, callback=%s, kwargs=%s)",