diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index ee282efd41..0d83a5633f 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -158,7 +158,7 @@ uint64_t time= rdtsc();
 {
     static FILE *f=NULL;
     if(!f) f=fopen("rate_qp_cplx.txt", "w");
-    fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size/(double)s->qscale);
+    fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
 }
 #endif