diff --git a/modules/rtp_rtcp/include/rtp_rtcp.h b/modules/rtp_rtcp/include/rtp_rtcp.h
index 5f7e0d901a..7829b8303d 100644
--- a/modules/rtp_rtcp/include/rtp_rtcp.h
+++ b/modules/rtp_rtcp/include/rtp_rtcp.h
@@ -110,7 +110,7 @@ class RtpRtcp : public Module, public RtcpFeedbackSenderInterface {
 
     // If set, field trials are read from |field_trials|, otherwise
     // defaults to  webrtc::FieldTrialBasedConfig.
-    WebRtcKeyValueConfig* field_trials = nullptr;
+    const WebRtcKeyValueConfig* field_trials = nullptr;
 
    private:
     RTC_DISALLOW_COPY_AND_ASSIGN(Configuration);