diff --git a/quic/core/quic_constants.h b/quic/core/quic_constants.h
index b6b6c74..587e8e2 100644
--- a/quic/core/quic_constants.h
+++ b/quic/core/quic_constants.h
@@ -72,9 +72,9 @@
 
 // Minimum size of initial flow control window, for both stream and session.
 // This is only enforced when version.AllowsLowFlowControlLimits() is false.
-const uint32_t kMinimumFlowControlSendWindow = 16 * 1024;  // 16 KB
+const QuicByteCount kMinimumFlowControlSendWindow = 16 * 1024;  // 16 KB
 // Default size of initial flow control window, for both stream and session.
-const uint32_t kDefaultFlowControlSendWindow = 16 * 1024;  // 16 KB
+const QuicByteCount kDefaultFlowControlSendWindow = 16 * 1024;  // 16 KB
 
 // Maximum flow control receive window limits for connection and stream.
 const QuicByteCount kStreamReceiveWindowLimit = 16 * 1024 * 1024;   // 16 MB