diff --git a/api/stats/rtcstats_objects.h b/api/stats/rtcstats_objects.h
index 42553c1..6f81784 100644
--- a/api/stats/rtcstats_objects.h
+++ b/api/stats/rtcstats_objects.h
@@ -483,7 +483,9 @@
   RTCStatsMember<double> estimated_playout_timestamp;
   // Only implemented for video.
   // TODO(https://crbug.com/webrtc/14178): Also implement for audio.
-  RTCStatsMember<std::string> decoder_implementation;
+  RTCRestrictedStatsMember<std::string,
+                           StatExposureCriteria::kHardwareCapability>
+      decoder_implementation;
   // FIR and PLI counts are only defined for |kind == "video"|.
   RTCStatsMember<uint32_t> fir_count;
   RTCStatsMember<uint32_t> pli_count;
@@ -548,7 +550,9 @@
   RTCStatsMember<std::string> content_type;
   // Only implemented for video.
   // TODO(https://crbug.com/webrtc/14178): Implement for audio as well.
-  RTCStatsMember<std::string> encoder_implementation;
+  RTCRestrictedStatsMember<std::string,
+                           StatExposureCriteria::kHardwareCapability>
+      encoder_implementation;
   // FIR and PLI counts are only defined for |kind == "video"|.
   RTCStatsMember<uint32_t> fir_count;
   RTCStatsMember<uint32_t> pli_count;