diff --git a/src/service/poc_mobile.proto b/src/service/poc_mobile.proto
index d03c68ac..201e2482 100644
--- a/src/service/poc_mobile.proto
+++ b/src/service/poc_mobile.proto
@@ -178,7 +178,7 @@ message invalidated_radio_threshold_report_req_v1 {
   bytes hotspot_pubkey = 2;
   // the reason the thresholds are invalidated
   invalidated_threshold_reason reason = 3;
-  // Timestamp in milliseconds since unix epoch
+  // Timestamp in seconds since unix epoch
   // of when the thresholds were invalidated
   uint64 timestamp = 4;
   // pubkey of the carrier identity service