diff --git a/lib_com/fft_fx.c b/lib_com/fft_fx.c
index 64a4c8be2d23ba1d0ceb7aeebd581bcf0e542314..2ab8a945136b2ae0bc14c3cc57210339ced04761 100644
--- a/lib_com/fft_fx.c
+++ b/lib_com/fft_fx.c
@@ -7299,3 +7299,14 @@ Flag is_zero_arr( Word32 *arr, Word16 size )
 
     return 1;
 }
+
+Flag is_zero_arr16( Word16 *arr, Word16 size )
+{
+    FOR( Word16 i = 0; i < size; i++ )
+    IF( arr[i] != 0 )
+    {
+        return 0;
+    }
+
+    return 1;
+}
diff --git a/lib_com/prot_fx.h b/lib_com/prot_fx.h
index 40086183d77af30f3b65cee59d3787d003c40497..e743c6ff0749c790d721a15211333c712c8aef14 100644
--- a/lib_com/prot_fx.h
+++ b/lib_com/prot_fx.h
@@ -4557,6 +4557,7 @@ Word16 L_norm_arr( Word32 *arr, Word16 size );
 Word16 get_min_scalefactor( Word32 x, Word32 y );
 
 Flag is_zero_arr( Word32 *arr, Word16 size );
+Flag is_zero_arr16( Word16 *arr, Word16 size );
 
 void edct2_fx_ivas(
     const Word16 n,
diff --git a/lib_dec/ivas_mdct_core_dec.c b/lib_dec/ivas_mdct_core_dec.c
index 96f15b91d5b7fbaeec4e2106fff0554f2a9fcead..b80bff932e923b09a077d4bad722d61314b63c07 100644
--- a/lib_dec/ivas_mdct_core_dec.c
+++ b/lib_dec/ivas_mdct_core_dec.c
@@ -1168,7 +1168,12 @@ void ivas_mdct_core_reconstruct_fx(
         }
         synth_fx = synth_buf_fx + st->hTcxDec->old_synth_len;
         synthFB_fx = synth_bufFB_fx + st->hTcxDec->old_synth_lenFB;
-
+        test();
+        if ( is_zero_arr16( st->hTcxDec->old_synth, st->hTcxDec->old_synth_len ) && is_zero_arr16( st->hTcxDec->old_synthFB_fx, st->hTcxDec->old_synth_lenFB ) )
+        {
+            st->hTcxDec->q_old_synth = 0;
+            move16();
+        }
         Copy( st->hTcxDec->old_synth, synth_buf_fx, st->hTcxDec->old_synth_len );                                                                // Q = st->hTcxDec->q_old_synth
         Copy_Scale_sig( st->hTcxDec->old_synthFB_fx, synth_bufFB_fx, st->hTcxDec->old_synth_lenFB, sub( st->hTcxDec->q_old_synth, st->Q_syn ) ); // Q = st->hTcxDec->q_old_synth
         q_syn = st->hTcxDec->q_old_synth;