diff --git a/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp b/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
index 476200681c..b4f52dd686 100644
--- a/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
+++ b/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
@@ -321,7 +321,8 @@ enum {
 };
 
 
-static const int kTimestampFactor = 1024;
+static const int kTimestampFactor = 1000;
+	// conversion factor between usec system time and msec tcp time
 
 
 static inline bigtime_t