diff --git a/include/opus/OpenMPT.txt b/include/opus/OpenMPT.txt
index c708c99e838..5118f9e969b 100644
--- a/include/opus/OpenMPT.txt
+++ b/include/opus/OpenMPT.txt
@@ -3,6 +3,7 @@ The following changes have been made:
  *  Obviously, unnecessary folders and files have been removed.
  *  celt/x86/vq_sse2.c has been modified to check for OPUS_X86_MAY_HAVE_SSE2.
  *  celt/x86/x86_arch_macros.c has been modified to support AVX and AVX2.
+ *  A warning in dnn/dred_encoder.c has been silenced.
  *  Performance warning in dnn/nnet.c has been silenced.
  *  Performance warning in dnn/nnet.h has been silenced.
  *  dnn/nnet_avx2.c has been modified to check for
diff --git a/include/opus/dnn/dred_encoder.c b/include/opus/dnn/dred_encoder.c
index edb49cc2c60..68eee85906f 100644
--- a/include/opus/dnn/dred_encoder.c
+++ b/include/opus/dnn/dred_encoder.c
@@ -133,7 +133,11 @@ static void dred_convert_to_16k(DREDEnc *enc, const float *in, int in_len, float
 {
     float downmix[MAX_DOWNMIX_BUFFER];
     int i;
+#if 0  /* OpenMPT */
     int up;
+#else  /* OpenMPT */
+    int up=0;  /* OpenMPT */
+#endif  /* OpenMPT */
     celt_assert(enc->channels*in_len <= MAX_DOWNMIX_BUFFER);
     celt_assert(in_len * (opus_int32)16000 == out_len * enc->Fs);
     switch(enc->Fs) {