diff --git a/quic/core/quic_framer.cc b/quic/core/quic_framer.cc
index fdb2074..c5708b9 100644
--- a/quic/core/quic_framer.cc
+++ b/quic/core/quic_framer.cc
@@ -3656,7 +3656,7 @@
     return false;
   }
 
-  if (ack_delay_time_in_us == kVarInt62MaxValue) {
+  if (ack_delay_time_in_us >= (kVarInt62MaxValue >> peer_ack_delay_exponent_)) {
     ack_frame->ack_delay_time = QuicTime::Delta::Infinite();
   } else {
     ack_delay_time_in_us = (ack_delay_time_in_us << peer_ack_delay_exponent_);