diff --git a/lib_com/options.h b/lib_com/options.h
index 38c9e6cd9b1c6ac5970cdc1fa57c6830a4c0be00..24808a6ccc5e1c873209f65f00b1b2efca8218cd 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -181,6 +181,7 @@
 #define ISAR_BITSTREAM_UPDATE_LC3PLUS                   /* FhG: Multiple improvements to the ISAR bitstream when LC3plus is used. See MR 1456 for details. */
 #endif
 #define NONBE_FIX_1058_DECODER_ERROR_WITH_REVERB_ROOM   /* FhG: issue 1058: do not initialize EFAP when IntSetup is HOA3 */
+#define FIX_963_USAN_ERROR                              /* Eri: Issue 963: USAN error in Stereo CNG, division by zero */
 #define NONBE_FIX_952_MC_PARAMUPMIX_5MS                       /* Dlb : issue 952 : Differences between 5ms and 20ms rendering for ParamUpmix*/
 #define NONBE_FIX_935_EARLY_REFLECTIONS_WRONG_ORDER           /* Qualcomm: issue 953: fix order or ER channels in LC mode*/
 #define FIX_955_FASTCONV_REND_IN_ISM                    /* VA: put FastConv rendering call under DEBUGGING */
diff --git a/lib_enc/ivas_stereo_dft_enc_itd.c b/lib_enc/ivas_stereo_dft_enc_itd.c
index 7913a8bf5546881db6b57b942f86b91bd7564611..4642f162a034a7d1a9ef0dcd1ea769fdb9ae54b2 100644
--- a/lib_enc/ivas_stereo_dft_enc_itd.c
+++ b/lib_enc/ivas_stereo_dft_enc_itd.c
@@ -910,7 +910,18 @@ void stereo_dft_enc_compute_itd(
                 {
                     hStereoDft->expectedNumUpdates += 1 + min( hCPE->hFrontVad[0]->rem_dtx_ho, hCPE->hFrontVad[1]->rem_dtx_ho );
                 }
+#ifdef FIX_963_USAN_ERROR
+                if ( hStereoDft->expectedNumUpdates + hStereoDft->currentNumUpdates == 0 )
+                {
+                    cng_xcorr_filt = max( CORR_FILT, sfm_L );
+                }
+                else
+                {
+                    cng_xcorr_filt = max( min( CORR_FILT, 10.0f * CORR_FILT / ( hStereoDft->expectedNumUpdates + hStereoDft->currentNumUpdates ) ), sfm_L );
+                }
+#else
                 cng_xcorr_filt = max( min( CORR_FILT, 10.0f * CORR_FILT / ( hStereoDft->expectedNumUpdates + hStereoDft->currentNumUpdates ) ), sfm_L );
+#endif
                 hStereoDft->currentNumUpdates++;
                 for ( i = 1; i < NFFT / 2; i++ )
                 {
@@ -945,7 +956,18 @@ void stereo_dft_enc_compute_itd(
             if ( vad_flag_dtx[0] == 0 )
             {
                 /* expectedNumUpdates updated after call to dtx() in SID frames */
+#ifdef FIX_963_USAN_ERROR
+                if ( hStereoDft->expectedNumUpdates + hStereoDft->currentNumUpdates == 0 )
+                {
+                    cng_xcorr_filt = max( CORR_FILT, sfm_L );
+                }
+                else
+                {
+                    cng_xcorr_filt = max( min( CORR_FILT, 10.0f * CORR_FILT / ( hStereoDft->expectedNumUpdates + hStereoDft->currentNumUpdates ) ), sfm_L );
+                }
+#else
                 cng_xcorr_filt = max( min( CORR_FILT, 10.0f * CORR_FILT / ( hStereoDft->expectedNumUpdates + hStereoDft->currentNumUpdates ) ), sfm_L );
+#endif
                 hStereoDft->currentNumUpdates++;
                 hStereoDft->sfm = cng_xcorr_filt;
             }