diff --git a/vp8/encoder/ratectrl.c b/vp8/encoder/ratectrl.c
index db1a327d7796dfc730bfdea98d4f7d72f8666472..1b1b69e17557274ad2583fc2e02ca564a97b7b41 100644
--- a/vp8/encoder/ratectrl.c
+++ b/vp8/encoder/ratectrl.c
@@ -932,6 +932,8 @@ static void calc_pframe_target_size(VP8_COMP *cpi)
             if (cpi->active_worst_quality <= cpi->active_best_quality)
                 cpi->active_worst_quality = cpi->active_best_quality + 1;
 
+            if(cpi->active_worst_quality > 127)
+                cpi->active_worst_quality = 127;
         }
         // Unbuffered mode (eg. video conferencing)
         else