diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 2e9cadd88e..21185dc586 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -496,6 +496,17 @@ void ff_clean_h263_qscales(MpegEncContext *s){
         if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i+1] ] >2)
             qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i+1] ]+2;
     }
+
+    if(s->codec_id != CODEC_ID_H263P){
+        for(i=1; i<s->mb_num; i++){
+            int mb_xy= s->mb_index2xy[i];
+        
+            if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){
+                s->mb_type[mb_xy]&= ~CANDIDATE_MB_TYPE_INTER4V;
+                s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER;
+            }
+        }
+    }
 }
 
 /**
@@ -507,15 +518,6 @@ void ff_clean_mpeg4_qscales(MpegEncContext *s){
 
     ff_clean_h263_qscales(s);
     
-    for(i=1; i<s->mb_num; i++){
-        int mb_xy= s->mb_index2xy[i];
-    
-        if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){
-            s->mb_type[mb_xy]&= ~CANDIDATE_MB_TYPE_INTER4V;
-            s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER;
-        }
-    }
-
     if(s->pict_type== B_TYPE){
         int odd=0;
         /* ok, come on, this isnt funny anymore, theres more code for handling this mpeg4 mess than