diff --git a/lib_com/options.h b/lib_com/options.h
index 8411d060e1491f069a694daae6efc8849ce69938..eb25a42271a4a25c2cfba967e8940bb57d8ec405 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -101,6 +101,7 @@
 #define FIX_1320_STACK_CPE_DECODER                      /* VA: issue 1320: Optimize the stack memory consumption in the CPE decoder */
 #define FIX_1984_SAT_IN_PSYCHAD                         /* VA: Issue 1984: proposal to fix an assert */
 #define NONBE_FIX_1261_MASA_EXT_META_JBM                /* Nokia: issue #1261: MASA metadata EXT output delay buffer init in JBM */
+#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 */
 
 /* #################### End BASOP porting switches ############################ */
 
diff --git a/lib_dec/ivas_masa_dec_fx.c b/lib_dec/ivas_masa_dec_fx.c
index 087ff9ae6e6382f87505c30e51398b76597c79bb..23366a6f831ffab738daa2d9ca6ed5d728d5eed2 100644
--- a/lib_dec/ivas_masa_dec_fx.c
+++ b/lib_dec/ivas_masa_dec_fx.c
@@ -1823,8 +1823,16 @@ ivas_error ivas_masa_dec_reconfigure_fx(
         test();
         test();
         test();
+#ifdef NONBE_FIX_1143_MASA_BRSW
+        test();
+        test();
+        IF( ( LT_32( ivas_total_brate, MASA_STEREO_MIN_BITRATE ) && GE_32( last_ivas_total_brate, MASA_STEREO_MIN_BITRATE ) ) ||
+            ( LT_32( ivas_total_brate, MASA_STEREO_MIN_BITRATE ) && EQ_32( last_ivas_total_brate, FRAME_NO_DATA ) ) ||
+            ( LT_32( ivas_total_brate, MASA_STEREO_MIN_BITRATE ) && EQ_32( last_ivas_total_brate, IVAS_SID_5k2 ) ) )
+#else
         IF( ( LT_32( ivas_total_brate, MASA_STEREO_MIN_BITRATE ) && GE_32( last_ivas_total_brate, MASA_STEREO_MIN_BITRATE ) ) ||
             ( LT_32( ivas_total_brate, MASA_STEREO_MIN_BITRATE ) && EQ_32( last_ivas_total_brate, FRAME_NO_DATA ) ) )
+#endif
         {
             st_ivas->hCPE[cpe_id]->nchan_out = 1;
             move16();