diff --git a/selfdrive/ui/replay/framereader.cc b/selfdrive/ui/replay/framereader.cc
index e896e686aa..88c3c86658 100644
--- a/selfdrive/ui/replay/framereader.cc
+++ b/selfdrive/ui/replay/framereader.cc
@@ -143,7 +143,7 @@ void FrameReader::decodeThread() {
   int idx = 0;
   while (!exit_) {
     const int from = std::max(idx, 0);
-    const int to = std::min(idx + 20, (int)frames_.size());
+    const int to = std::min(from + 20, (int)frames_.size());
     for (int i = 0; i < frames_.size() && !exit_; ++i) {
       Frame &frame = frames_[i];
       if (i >= from && i < to) {