diff --git a/lib_com/options.h b/lib_com/options.h
index f2257e73d11d6435d75fc071d0763ff15bd3c38a..9401a6f974d56ba972b07ee213d3fa4d6bec44b6 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -183,10 +183,11 @@
 
 #define NONBE_FIX_1141_OSBA_ROOM_RENDERING                    /* FhG: Fix for issue 1141: render objects in OSBA decoder with room effect */
 #define NONBE_FIX_981_PARAMBIN_DEFAULT_EARLY_PART             /* Nokia: Set default early part energy correction to unity for BINAURAL_ROOM_REVERB */
+#define NONBE_FIX_1143_MASA_BRSW                              /* Nok: Fix for issue 1143: MSAN use of uninitialized value in masa decoding to binaural with dtx bitrate switching and 5 % FER */
 
 
 #define NONE_BE_FIX_816_LFE_PLC_FLOAT                   /* DLB: issue 816: reduce required precision to float for LFE-PLC*/
-                         
+
 /* ##################### End NON-BE switches ########################### */
 
 /* ################## End DEVELOPMENT switches ######################### */
diff --git a/lib_dec/ivas_masa_dec.c b/lib_dec/ivas_masa_dec.c
index 50cd432deaf0630db12f525a909ed395f7637abb..544f3d36bfba6da5fdde037eda6ba8a87bdcafe9 100644
--- a/lib_dec/ivas_masa_dec.c
+++ b/lib_dec/ivas_masa_dec.c
@@ -1393,11 +1393,16 @@ ivas_error ivas_masa_dec_reconfigure(
         sts = st_ivas->hCPE[cpe_id]->hCoreCoder;
         sts[0]->bit_stream = bit_stream + num_bits;
         num_bits += (int16_t) ( st_ivas->hCPE[cpe_id]->element_brate / FRAMES_PER_SEC );
+#ifdef NONBE_FIX_1143_MASA_BRSW
+        if ( ( ivas_total_brate < MASA_STEREO_MIN_BITRATE && last_ivas_total_brate >= MASA_STEREO_MIN_BITRATE ) ||
+             ( ivas_total_brate < MASA_STEREO_MIN_BITRATE && last_ivas_total_brate == FRAME_NO_DATA ) ||
+             ( ivas_total_brate < MASA_STEREO_MIN_BITRATE && last_ivas_total_brate == IVAS_SID_5k2 ) )
+#else
         if ( ( ivas_total_brate < MASA_STEREO_MIN_BITRATE && last_ivas_total_brate >= MASA_STEREO_MIN_BITRATE ) ||
              ( ivas_total_brate < MASA_STEREO_MIN_BITRATE && last_ivas_total_brate == FRAME_NO_DATA ) )
+#endif
         {
             st_ivas->hCPE[cpe_id]->nchan_out = 1;
-
             if ( ( st_ivas->renderer_type == RENDERER_DIRAC && st_ivas->hDirACRend != NULL ) || ( ( st_ivas->renderer_type == RENDERER_STEREO_PARAMETRIC || st_ivas->renderer_type == RENDERER_BINAURAL_PARAMETRIC || st_ivas->renderer_type == RENDERER_BINAURAL_PARAMETRIC_ROOM ) && st_ivas->hDiracDecBin[0] != NULL ) )
             {
                 if ( ( error = ivas_dirac_dec_config( st_ivas, DIRAC_RECONFIGURE ) ) != IVAS_ERR_OK )