diff --git a/webrtc/modules/audio_coding/main/acm2/acm_receiver.cc b/webrtc/modules/audio_coding/main/acm2/acm_receiver.cc
index 120556807..826d4c4f0 100644
--- a/webrtc/modules/audio_coding/main/acm2/acm_receiver.cc
+++ b/webrtc/modules/audio_coding/main/acm2/acm_receiver.cc
@@ -505,8 +505,7 @@ int32_t AcmReceiver::AddCodec(int acm_codec_id,
     ret_val = neteq_->RegisterPayloadType(neteq_decoder, payload_type);
   } else {
     ret_val = neteq_->RegisterExternalDecoder(
-        audio_decoder, neteq_decoder,
-        ACMCodecDB::database_[acm_codec_id].plfreq, payload_type);
+        audio_decoder, neteq_decoder, payload_type);
   }
   if (ret_val != NetEq::kOK) {
     LOG_FERR3(LS_ERROR, "AcmReceiver::AddCodec", acm_codec_id, payload_type,
diff --git a/webrtc/modules/audio_coding/neteq4/interface/neteq.h b/webrtc/modules/audio_coding/neteq4/interface/neteq.h
index 0f6f4062a..8defe4f72 100644
--- a/webrtc/modules/audio_coding/neteq4/interface/neteq.h
+++ b/webrtc/modules/audio_coding/neteq4/interface/neteq.h
@@ -161,11 +161,10 @@ class NetEq {
 
   // Provides an externally created decoder object |decoder| to insert in the
   // decoder database. The decoder implements a decoder of type |codec| and
-  // associates it with |rtp_payload_type|. The decoder operates at the
-  // frequency |sample_rate_hz|. Returns kOK on success, kFail on failure.
+  // associates it with |rtp_payload_type|. Returns kOK on success,
+  // kFail on failure.
   virtual int RegisterExternalDecoder(AudioDecoder* decoder,
                                       enum NetEqDecoder codec,
-                                      int sample_rate_hz,
                                       uint8_t rtp_payload_type) = 0;
 
   // Removes |rtp_payload_type| from the codec database. Returns 0 on success,
diff --git a/webrtc/modules/audio_coding/neteq4/neteq_external_decoder_unittest.cc b/webrtc/modules/audio_coding/neteq4/neteq_external_decoder_unittest.cc
index 0b6706b4d..8cfe48395 100644
--- a/webrtc/modules/audio_coding/neteq4/neteq_external_decoder_unittest.cc
+++ b/webrtc/modules/audio_coding/neteq4/neteq_external_decoder_unittest.cc
@@ -80,7 +80,6 @@ class NetEqExternalDecoderTest : public ::testing::Test {
     ASSERT_EQ(NetEq::kOK,
               neteq_external_->RegisterExternalDecoder(external_decoder_,
                                                        decoder,
-                                                       sample_rate_hz_,
                                                        kPayloadType));
     ASSERT_EQ(NetEq::kOK,
               neteq_->RegisterPayloadType(decoder, kPayloadType));
diff --git a/webrtc/modules/audio_coding/neteq4/neteq_impl.cc b/webrtc/modules/audio_coding/neteq4/neteq_impl.cc
index e407ee83e..dcf48ad41 100644
--- a/webrtc/modules/audio_coding/neteq4/neteq_impl.cc
+++ b/webrtc/modules/audio_coding/neteq4/neteq_impl.cc
@@ -201,7 +201,6 @@ int NetEqImpl::RegisterPayloadType(enum NetEqDecoder codec,
 
 int NetEqImpl::RegisterExternalDecoder(AudioDecoder* decoder,
                                        enum NetEqDecoder codec,
-                                       int sample_rate_hz,
                                        uint8_t rtp_payload_type) {
   CriticalSectionScoped lock(crit_sect_.get());
   LOG_API2(static_cast<int>(rtp_payload_type), codec);
@@ -210,6 +209,7 @@ int NetEqImpl::RegisterExternalDecoder(AudioDecoder* decoder,
     assert(false);
     return kFail;
   }
+  const int sample_rate_hz = AudioDecoder::CodecSampleRateHz(codec);
   int ret = decoder_database_->InsertExternal(rtp_payload_type, codec,
                                               sample_rate_hz, decoder);
   if (ret != DecoderDatabase::kOK) {
diff --git a/webrtc/modules/audio_coding/neteq4/neteq_impl.h b/webrtc/modules/audio_coding/neteq4/neteq_impl.h
index 3d883a014..09a0049fb 100644
--- a/webrtc/modules/audio_coding/neteq4/neteq_impl.h
+++ b/webrtc/modules/audio_coding/neteq4/neteq_impl.h
@@ -115,11 +115,10 @@ class NetEqImpl : public webrtc::NetEq {
 
   // Provides an externally created decoder object |decoder| to insert in the
   // decoder database. The decoder implements a decoder of type |codec| and
-  // associates it with |rtp_payload_type|. The decoder operates at the
-  // frequency |sample_rate_hz|. Returns kOK on success, kFail on failure.
+  // associates it with |rtp_payload_type|. Returns kOK on success, kFail on
+  // failure.
   virtual int RegisterExternalDecoder(AudioDecoder* decoder,
                                       enum NetEqDecoder codec,
-                                      int sample_rate_hz,
                                       uint8_t rtp_payload_type);
 
   // Removes |rtp_payload_type| from the codec database. Returns 0 on success,
diff --git a/webrtc/modules/audio_coding/neteq4/neteq_impl_unittest.cc b/webrtc/modules/audio_coding/neteq4/neteq_impl_unittest.cc
index 27e8b52db..15a1c8b8b 100644
--- a/webrtc/modules/audio_coding/neteq4/neteq_impl_unittest.cc
+++ b/webrtc/modules/audio_coding/neteq4/neteq_impl_unittest.cc
@@ -452,7 +452,7 @@ TEST_F(NetEqImplTest, VerifyTimestampPropagation) {
 
   EXPECT_EQ(NetEq::kOK,
             neteq_->RegisterExternalDecoder(
-                &decoder_, kDecoderPCM16B, 8000, kPayloadType));
+                &decoder_, kDecoderPCM16B, kPayloadType));
 
   // Insert one packet.
   EXPECT_EQ(NetEq::kOK,