diff --git a/lib_com/options.h b/lib_com/options.h
index 2a168d693395fb4f3e2900b6dc457dde4e801c09..1063c88614c74464f49dbb840420a5f4e6803a73 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -177,6 +177,7 @@
 #define NONBE_FIX_1070_USAN_SEGFAULT_MC_TO_BIN_BTSW_HEADROT   /* fix 1070 USAN: nullptr-with-offset and Segfaults in 7_1_4 to BINAURAL and BINAURAL_ROOM_REVERB decoding with bitrate switching and head rotation*/ 
 #define NONBE_FIX_MC_LFE_LPF                            /* Dlb: Adding the LFE LPF filter back for MC content. */
 #define NONBE_FIX_1052_SBA_EXT                          /* Dlb: SBA external output support */
+#define NONBE_FIX_1087_OOB_SBA_DTX_RS                   /* VA: issue 1087: Extend the length of the buffer for MCT decoding to avoid out-of-bound writing in SBA SID bitrate switching decoding */
 
 #define NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR            /* Nok: issue 1074 fixing number of objects signaling in OMASA low rate */
 /* ##################### End NON-BE switches ########################### */
diff --git a/lib_dec/ivas_mct_dec.c b/lib_dec/ivas_mct_dec.c
index 288f2b12a24c8ca136d38761af399569f646d100..20e40412de2d8430748850d5fa0ea40ef309484e 100644
--- a/lib_dec/ivas_mct_dec.c
+++ b/lib_dec/ivas_mct_dec.c
@@ -87,6 +87,9 @@ ivas_error ivas_mct_dec(
     STnsData tnsData[MCT_MAX_BLOCKS][CPE_CHANNELS][NB_DIV];
     Decoder_State **sts;
     float synth[CPE_CHANNELS][L_FRAME_PLUS];
+#ifdef NONBE_FIX_1087_OOB_SBA_DTX_RS
+    float *p_output_orig[2];
+#endif
     float output_lfe_ch[L_FRAME48k];
     int32_t ivas_total_brate;
     ivas_error error;
@@ -148,6 +151,18 @@ ivas_error ivas_mct_dec(
     /* MCT side bits decoder */
     ivas_mct_side_bits( hMCT, st_ivas->hCPE, nCPE, st_ivas->hCPE[0]->hCoreCoder[0], st_ivas->bfi, st_ivas->hCPE[0]->hCoreCoder[0]->bit_stream, ivas_total_brate, nb_bits_metadata );
 
+#ifdef NONBE_FIX_1087_OOB_SBA_DTX_RS
+    /* in case of switching from an SID frame (with ACELP core) to MCT, buffer of L_FRAME_PLUS samples is needed -> use synth[] as a temporary buffer */
+    if ( st_ivas->hCPE[0]->hCoreCoder[0]->last_core == ACELP_CORE )
+    {
+        for ( n = 0; n < CPE_CHANNELS; n++ )
+        {
+            p_output_orig[n] = output[n];
+            output[n] = synth[n];
+        }
+    }
+#endif
+
     for ( cpe_id = 0; cpe_id < nCPE; cpe_id++ )
     {
         st_ivas->hCPE[cpe_id]->hCoreCoder[0]->BER_detect |= st_ivas->BER_detect;
@@ -232,6 +247,17 @@ ivas_error ivas_mct_dec(
 
         ivas_mdct_core_reconstruct( hCPE, x, synth, fUseTns[cpe_id], 1 );
 
+#ifdef NONBE_FIX_1087_OOB_SBA_DTX_RS
+        /* set pointers back */
+        if ( cpe_id == 0 && st_ivas->hCPE[0]->hCoreCoder[0]->last_core == ACELP_CORE )
+        {
+            for ( n = 0; n < CPE_CHANNELS; n++ )
+            {
+                output[n] = p_output_orig[n];
+            }
+        }
+
+#endif
         /*----------------------------------------------------------------*
          * CoreCoder Post-processing and updates
          *----------------------------------------------------------------*/
@@ -263,7 +289,6 @@ ivas_error ivas_mct_dec(
 #endif
         } /* n_channels loop */
 
-
         /* synthesis synchronization between stereo modes */
         if ( !st_ivas->sba_dirac_stereo_flag || ( st_ivas->ivas_format == SBA_ISM_FORMAT && cpe_id < nCPE - 2 ) )
         {