diff --git a/decoder/ihevcd_parse_slice_header.c b/decoder/ihevcd_parse_slice_header.c
index a68db25..e1b50b7 100644
--- a/decoder/ihevcd_parse_slice_header.c
+++ b/decoder/ihevcd_parse_slice_header.c
@@ -257,10 +257,11 @@
     {
         pps_t *ps_pps_ref = ps_codec->ps_pps_base;
         while(0 == ps_pps_ref->i1_pps_valid)
+        {
             ps_pps_ref++;
-
-        if((ps_pps_ref - ps_codec->ps_pps_base >= MAX_PPS_CNT - 1))
-            return IHEVCD_INVALID_HEADER;
+            if((ps_pps_ref - ps_codec->ps_pps_base >= MAX_PPS_CNT - 1))
+                return IHEVCD_INVALID_HEADER;
+        }
 
         ihevcd_copy_pps(ps_codec, pps_id, ps_pps_ref->i1_pps_id);
     }