diff --git a/decoder/ih264d_dpb_mgr.c b/decoder/ih264d_dpb_mgr.c
index 525adef..b7ee498 100644
--- a/decoder/ih264d_dpb_mgr.c
+++ b/decoder/ih264d_dpb_mgr.c
@@ -375,9 +375,6 @@
         if((ps_dpb_info[i].ps_pic_buf == ps_pic_buf)
                         && ps_dpb_info[i].u1_used_as_ref)
         {
-            /* Can occur only for field bottom pictures */
-            ps_dpb_info[i].s_bot_field.u1_reference_info = IS_SHORT_TERM;
-
             /*signal an error in the case of frame pic*/
             if(ps_dpb_info[i].ps_pic_buf->u1_pic_type == FRM_PIC)
             {
@@ -385,6 +382,8 @@
             }
             else
             {
+                /* Can occur only for field bottom pictures */
+                ps_dpb_info[i].s_bot_field.u1_reference_info = IS_SHORT_TERM;
                 return OK;
             }
         }