diff --git a/vpxenc.c b/vpxenc.c
index 059cdd596..d32b21b53 100644
--- a/vpxenc.c
+++ b/vpxenc.c
@@ -2128,6 +2128,7 @@ static void setup_pass(struct stream_state  *stream,
 
     stream->cx_time = 0;
     stream->nbytes = 0;
+    stream->frames_out = 0;
 }