diff --git a/sfm/server.py b/sfm/server.py
index 4b58051..47ab414 100644
--- a/sfm/server.py
+++ b/sfm/server.py
@@ -315,6 +315,13 @@ def device_events(
     except Exception as exc:
         raise HTTPException(status_code=500, detail=f"Device error: {exc}") from exc
 
+    # Fill sample_rate from compliance config where the event record doesn't supply it.
+    # sample_rate is a device-level setting, not stored per-event in the waveform record.
+    if info.compliance_config and info.compliance_config.sample_rate:
+        for ev in events:
+            if ev.sample_rate is None:
+                ev.sample_rate = info.compliance_config.sample_rate
+
     return {
         "device":      _serialise_device_info(info),
         "event_count": len(events),