diff --git a/lib_com/options.h b/lib_com/options.h
old mode 100644
new mode 100755
index 98d71f99c3137d48b0079b5304e349b62e238129..196b139bfbf922376b7ebf4fd8c29d48538714d9
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -147,7 +147,9 @@
 /*#define FIX_I1_113*/                                  /* under review : MCT bit distribution optimization for SBA high bitrates*/
 
 
-#define LBR_SBA_CORE_CODING_TUNING                      /* Contribution "3 Core Coder Tuning for low bitrate SBA with 2 TCs" */ 
+#define LBR_SBA_CORE_CODING_TUNING                      /* Contribution "3 Core Coder Tuning for low bitrate SBA with 2 TCs" */
+
+#define FIX_WRONG_NBANDS_IN_ITD_ESTIMATION              /* Issue 85: fix incorrect setting of nbands in calc_mean_E_ratio() if bwidth is limited on commandline*/
 
 /* ################## End DEVELOPMENT switches ######################### */
 /* clang-format on */
diff --git a/lib_enc/ivas_stereo_dft_enc_itd.c b/lib_enc/ivas_stereo_dft_enc_itd.c
old mode 100644
new mode 100755
index 5b47e9dc5240c2a25bb2dd17723d91304cc692cc..fd39db32d3b68f2a9d249fe29c2d14efda7921cc
--- a/lib_enc/ivas_stereo_dft_enc_itd.c
+++ b/lib_enc/ivas_stereo_dft_enc_itd.c
@@ -446,7 +446,9 @@ static float calc_mean_E_ratio(
     ITD_DATA_HANDLE hItd,
     int16_t nbands,
     int16_t band_limits[],
+#ifndef FIX_WRONG_NBANDS_IN_ITD_ESTIMATION
     const int16_t NFFT,
+#endif
     const float sfm,
     const float nrg_L[STEREO_DFT_N_32k_ENC / 2],
     const float nrg_R[STEREO_DFT_N_32k_ENC / 2],
@@ -467,7 +469,11 @@ static float calc_mean_E_ratio(
     grand_sum_xcorr_img = 0.0f;
 
     /*take bands up to 32kHz bandwidth as ITD is always calculated at 32kHz sampling rate*/
+#ifdef FIX_WRONG_NBANDS_IN_ITD_ESTIMATION
+    nbands -= ( band_limits[nbands] > STEREO_DFT_N_32k_ENC / 2 );
+#else
     nbands -= ( NFFT > STEREO_DFT_N_32k_ENC );
+#endif
 
     sum_Er = 0;
     for ( b = 0; b < nbands; b++ )
@@ -1238,7 +1244,11 @@ void stereo_dft_enc_compute_itd(
     /*calculate mean E ratio of main to background signal for cohSNR*/
     if ( hCPE->element_mode == IVAS_CPE_DFT )
     {
+#ifdef FIX_WRONG_NBANDS_IN_ITD_ESTIMATION
+        mEr = calc_mean_E_ratio( hItd, hStereoDft->nbands, hStereoDft->band_limits, sfm_L, pNrgL, pNrgR, &total_mEr );
+#else
         mEr = calc_mean_E_ratio( hItd, hStereoDft->nbands, hStereoDft->band_limits, hStereoDft->NFFT, sfm_L, pNrgL, pNrgR, &total_mEr );
+#endif
     }
     else
     {
@@ -1247,7 +1257,11 @@ void stereo_dft_enc_compute_itd(
 
         set_s( band_limits, 0, STEREO_DFT_BAND_MAX + 1 );
         set_band_limits( &nbands, band_limits, hCPE->hStereoMdct->hDft_ana->NFFT );
+#ifdef FIX_WRONG_NBANDS_IN_ITD_ESTIMATION
+        mEr = calc_mean_E_ratio( hItd, nbands, band_limits, sfm_L, pNrgL, pNrgR, &total_mEr );
+#else
         mEr = calc_mean_E_ratio( hItd, nbands, band_limits, hCPE->hStereoMdct->hDft_ana->NFFT, sfm_L, pNrgL, pNrgR, &total_mEr );
+#endif
     }
 
     /*calculate total cohSNR for frame in dB*/