diff --git a/media/libstagefright/wifi-display/ANetworkSession.cpp b/media/libstagefright/wifi-display/ANetworkSession.cpp
index 88ca1cc..f074438 100644
--- a/media/libstagefright/wifi-display/ANetworkSession.cpp
+++ b/media/libstagefright/wifi-display/ANetworkSession.cpp
@@ -451,24 +451,6 @@
             const Fragment &frag = *mOutFragments.begin();
             const sp<ABuffer> &datagram = frag.mBuffer;
 
-            uint8_t *data = datagram->data();
-            if (data[0] == 0x80 && (data[1] & 0x7f) == 33) {
-                int64_t nowUs = ALooper::GetNowUs();
-
-                uint32_t prevRtpTime = U32_AT(&data[4]);
-
-                // 90kHz time scale
-                uint32_t rtpTime = (nowUs * 9ll) / 100ll;
-                int32_t diffTime = (int32_t)rtpTime - (int32_t)prevRtpTime;
-
-                ALOGV("correcting rtpTime by %.0f ms", diffTime / 90.0);
-
-                data[4] = rtpTime >> 24;
-                data[5] = (rtpTime >> 16) & 0xff;
-                data[6] = (rtpTime >> 8) & 0xff;
-                data[7] = rtpTime & 0xff;
-            }
-
             int n;
             do {
                 n = send(mSocket, datagram->data(), datagram->size(), 0);
@@ -874,6 +856,14 @@
             err = -errno;
             goto bail2;
         }
+
+        int tos = 224;  // VOICE
+        res = setsockopt(s, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
+
+        if (res < 0) {
+            err = -errno;
+            goto bail2;
+        }
     }
 
     err = MakeSocketNonBlocking(s);