diff --git a/lib_com/options.h b/lib_com/options.h
old mode 100755
new mode 100644
index 4fb0a0b58b663b7f74a8b6ec295cf4e925439f6f..3da2cc42e82f8cf90ccbc168d4607ea56175312c
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -169,6 +169,8 @@
 #define NONBE_FIX_874_OMASA_BRSW_2TD                          /* Nokia: issue 874: Fixes the crashes with the long test vectors that prompted switching to TD*/
 #define NONBE_FIX_871_ACELP_CRASH_IN_OSBA                     /* FhG: isse 871: crash in ACELP core encoder with OSBA */
 #define NONBE_FIX_906_SBA_LBR_SMOOTHING                       /* FhG: issue #906: fix SBA low bit rate smoothing for HOA2/HOA3 output */
+#define NONBE_FIX_878_RS_FEC_STEREO_CNG                       /* Eri: Frame loss and Unified Stereo CNG may cause false BER detection which results in corrupt bitstream decoding */
+
 /* ##################### End NON-BE switches ########################### */
 
 /* ################## End DEVELOPMENT switches ######################### */
diff --git a/lib_dec/ivas_cpe_dec.c b/lib_dec/ivas_cpe_dec.c
index d8b5ec4713a9793a619a825e7e5ad47a8a3b493a..083ed0eb1ba482baaf533d1448bc2dbf187657f2 100644
--- a/lib_dec/ivas_cpe_dec.c
+++ b/lib_dec/ivas_cpe_dec.c
@@ -248,6 +248,10 @@ ivas_error ivas_cpe_dec(
             {
                 nb_bits -= SID_FORMAT_NBITS;
                 sts[1]->bit_stream -= SID_FORMAT_NBITS;
+#ifdef NONBE_FIX_878_RS_FEC_STEREO_CNG
+                /* set total bitrate of Stereo CNG parameters for BER detection */
+                sts[1]->total_brate = IVAS_SID_5k2 - SID_2k40;
+#endif
             }
 
             if ( ( ( st_ivas->ivas_format == MASA_FORMAT && ivas_total_brate < MASA_STEREO_MIN_BITRATE ) || ( st_ivas->ivas_format == MASA_ISM_FORMAT && cpe_brate < MASA_STEREO_MIN_BITRATE ) ) && ivas_total_brate > IVAS_SID_5k2 )