diff --git a/decoder/ih264d_api.c b/decoder/ih264d_api.c
index c264d9a..b6d4e35 100644
--- a/decoder/ih264d_api.c
+++ b/decoder/ih264d_api.c
@@ -889,6 +889,43 @@ void ih264d_init_decoder(void * ps_dec_params)
     dec_struct_t * ps_dec = (dec_struct_t *)ps_dec_params;
     dec_slice_params_t *ps_cur_slice;
     pocstruct_t *ps_prev_poc, *ps_cur_poc;
+    WORD32 size;
+
+    size = sizeof(pred_info_t) * 2 * 32;
+    memset(ps_dec->ps_pred, 0 , size);
+
+    size = sizeof(disp_mgr_t);
+    memset(ps_dec->pv_disp_buf_mgr, 0 , size);
+
+    size = sizeof(buf_mgr_t) + ithread_get_mutex_lock_size();
+    memset(ps_dec->pv_pic_buf_mgr, 0, size);
+
+    size = sizeof(dec_err_status_t);
+    memset(ps_dec->ps_dec_err_status, 0, size);
+
+    size = sizeof(sei);
+    memset(ps_dec->ps_sei, 0, size);
+
+    size = sizeof(dpb_commands_t);
+    memset(ps_dec->ps_dpb_cmds, 0, size);
+
+    size = sizeof(dec_bit_stream_t);
+    memset(ps_dec->ps_bitstrm, 0, size);
+
+    size = sizeof(dec_slice_params_t);
+    memset(ps_dec->ps_cur_slice, 0, size);
+
+    size = MAX(sizeof(dec_seq_params_t), sizeof(dec_pic_params_t));
+    memset(ps_dec->pv_scratch_sps_pps, 0, size);
+
+    size = sizeof(ctxt_inc_mb_info_t);
+    memset(ps_dec->ps_left_mb_ctxt_info, 0, size);
+
+    size = (sizeof(neighbouradd_t) << 2);
+    memset(ps_dec->ps_left_mvpred_addr, 0 ,size);
+
+    size = sizeof(buf_mgr_t) + ithread_get_mutex_lock_size();
+    memset(ps_dec->pv_mv_buf_mgr, 0, size);
 
     /* Free any dynamic buffers that are allocated */
     ih264d_free_dynamic_bufs(ps_dec);