diff --git a/dnn/lpcnet.c b/dnn/lpcnet.c
index 31fe06d9..eb179215 100644
--- a/dnn/lpcnet.c
+++ b/dnn/lpcnet.c
@@ -280,6 +280,8 @@ LPCNET_EXPORT void lpcnet_synthesize(LPCNetState *lpcnet, const float *features,
     lpcnet_synthesize_impl(lpcnet, features, output, N, 0);
 }
 
+#ifndef OPUS_BUILD
+
 LPCNET_EXPORT int lpcnet_decoder_get_size()
 {
   return sizeof(LPCNetDecState);
@@ -316,3 +318,4 @@ LPCNET_EXPORT int lpcnet_decode(LPCNetDecState *st, const unsigned char *buf, sh
   return 0;
 }
 
+#endif
diff --git a/dnn/lpcnet_dec.c b/dnn/lpcnet_dec.c
index 8ae70c15..d8df4d1c 100644
--- a/dnn/lpcnet_dec.c
+++ b/dnn/lpcnet_dec.c
@@ -77,6 +77,7 @@ unsigned int bits_unpack(unpacker *bits, int nb_bits) {
   return d;
 }
 
+#ifndef OPUS_BUILD
 void decode_packet(float features[4][NB_TOTAL_FEATURES], float *vq_mem, const unsigned char buf[8])
 {
   int c0_id;
@@ -152,3 +153,4 @@ void decode_packet(float features[4][NB_TOTAL_FEATURES], float *vq_mem, const un
 
   RNN_COPY(vq_mem, &features[3][0], NB_BANDS);
 }
+#endif
diff --git a/dnn/lpcnet_enc.c b/dnn/lpcnet_enc.c
index e46be370..9fc3d1f5 100644
--- a/dnn/lpcnet_enc.c
+++ b/dnn/lpcnet_enc.c
@@ -45,6 +45,7 @@
 #include "lpcnet_private.h"
 #include "lpcnet.h"
 
+#ifndef OPUS_BUILD
 
 #define SURVIVORS 5
 
@@ -461,6 +462,7 @@ void bits_pack(packer *bits, unsigned int data, int nb_bits) {
   }
 }
 
+#endif
 
 LPCNET_EXPORT int lpcnet_encoder_get_size() {
   return sizeof(LPCNetEncState);
@@ -586,11 +588,13 @@ void process_superframe(LPCNetEncState *st, unsigned char *buf, FILE *ffeat, int
   float center_pitch;
   int main_pitch;
   int modulation;
+  int corr_id = 0;
+#ifndef OPUS_BUILD
   int c0_id=0;
   int vq_end[3]={0};
   int vq_mid=0;
-  int corr_id = 0;
   int interp_id=0;
+#endif
   for(sub=0;sub<8;sub++) frame_weight_sum += st->frame_weight[2+sub];
   for(sub=0;sub<8;sub++) st->frame_weight[2+sub] *= (8.f/frame_weight_sum);
   for(sub=0;sub<8;sub++) {
@@ -690,6 +694,7 @@ void process_superframe(LPCNetEncState *st, unsigned char *buf, FILE *ffeat, int
   /*printf("%d %f %f %f\n", best_period, best_a, best_b, best_corr);*/
   RNN_COPY(&st->xc[0][0], &st->xc[8][0], PITCH_MAX_PERIOD);
   RNN_COPY(&st->xc[1][0], &st->xc[9][0], PITCH_MAX_PERIOD);
+#ifndef OPUS_BUILD
   if (quantize) {
     /*printf("%f\n", st->features[3][0]);*/
     c0_id = (int)floor(.5 + st->features[3][0]*4);
@@ -701,6 +706,7 @@ void process_superframe(LPCNetEncState *st, unsigned char *buf, FILE *ffeat, int
     interp_id = double_interp_search(st->features, st->vq_mem);
     perform_double_interp(st->features, st->vq_mem, interp_id);
   }
+#endif
   for (sub=0;sub<4;sub++) {
     lpc_from_cepstrum(st->lpc, st->features[sub]);
     for (i=0;i<LPC_ORDER;i++) st->features[sub][NB_BANDS+2+i] = st->lpc[i];
@@ -708,6 +714,7 @@ void process_superframe(LPCNetEncState *st, unsigned char *buf, FILE *ffeat, int
   /*printf("\n");*/
   RNN_COPY(st->vq_mem, &st->features[3][0], NB_BANDS);
   if (encode) {
+#ifndef OPUS_BUILD
     packer bits;
     /*fprintf(stdout, "%d %d %d %d %d %d %d %d %d\n", c0_id+64, main_pitch, voiced ? modulation+4 : 0, corr_id, vq_end[0], vq_end[1], vq_end[2], vq_mid, interp_id);*/
     bits_packer_init(&bits, buf, 8);
@@ -721,6 +728,9 @@ void process_superframe(LPCNetEncState *st, unsigned char *buf, FILE *ffeat, int
     bits_pack(&bits, vq_mid, 13);
     bits_pack(&bits, interp_id, 3);
     if (ffeat) fwrite(buf, 1, 8, ffeat);
+#else
+    (void)buf;
+#endif
   } else if (ffeat) {
     for (i=0;i<4;i++) {
       fwrite(st->features[i], sizeof(float), NB_TOTAL_FEATURES, ffeat);
diff --git a/dnn/lpcnet_private.h b/dnn/lpcnet_private.h
index 39cfbf7d..3a85847e 100644
--- a/dnn/lpcnet_private.h
+++ b/dnn/lpcnet_private.h
@@ -105,10 +105,12 @@ struct LPCNetPLCState {
   short queued_samples[FRAME_SIZE];
 };
 
+#ifndef OPUS_BUILD
 extern float ceps_codebook1[];
 extern float ceps_codebook2[];
 extern float ceps_codebook3[];
 extern float ceps_codebook_diff4[];
+#endif
 
 void preemphasis(float *y, float *mem, const float *x, float coef, int N);