diff --git a/lib_dec/evs_dec_fx.c b/lib_dec/evs_dec_fx.c
index aa997d4c0ac0645456a3d8afddcca734c0c345be..f20ff77f30367e0dc15e2f7936f0d46892a4a014 100644
--- a/lib_dec/evs_dec_fx.c
+++ b/lib_dec/evs_dec_fx.c
@@ -36,7 +36,7 @@ ivas_error evs_dec_fx(
     Word16 exp, fra;
     Word16 tmp_buffer_fx[L_FRAME48k];
     Word16 tmp16, tmp16_2;
-    Word16 synth_fx[L_FRAME48k];
+    Word16 synth_fx[L_FRAME48k + HQ_DELTA_MAX * HQ_DELAY_COMP];
     Word16 fb_exc_fx[L_FRAME16k];
     Word16 pitch_buf_fx[NB_SUBFR16k] = { 0 };
     Word16 Q_fb_exc;