diff --git a/com.unity.netcode.gameobjects/CHANGELOG.md b/com.unity.netcode.gameobjects/CHANGELOG.md
index fa02926287..5814739ba6 100644
--- a/com.unity.netcode.gameobjects/CHANGELOG.md
+++ b/com.unity.netcode.gameobjects/CHANGELOG.md
@@ -8,9 +8,14 @@ Additional documentation and release notes are available at [Multiplayer Documen
 
 ## [Unreleased]
 
+### Added
+
 ### Fixed
 
 - Fixed a bug where having a class with Rpcs that inherits from a class without Rpcs that inherits from NetworkVariable would cause a compile error. (#2751)
+- Fixed issue where `NetworkBehaviour.Synchronize` was not truncating the write buffer if nothing was serialized during `NetworkBehaviour.OnSynchronize` causing an additional 6 bytes to be written per `NetworkBehaviour` component instance. (#2749)
+
+### Changed
 
 ## [1.7.0] - 2023-10-11
 
diff --git a/com.unity.netcode.gameobjects/Runtime/Core/NetworkBehaviour.cs b/com.unity.netcode.gameobjects/Runtime/Core/NetworkBehaviour.cs
index e0d0f21bef..7a5bd73b32 100644
--- a/com.unity.netcode.gameobjects/Runtime/Core/NetworkBehaviour.cs
+++ b/com.unity.netcode.gameobjects/Runtime/Core/NetworkBehaviour.cs
@@ -993,6 +993,8 @@ internal bool Synchronize<T>(ref BufferSerializer<T> serializer, ulong targetCli
                 if (finalPosition == positionBeforeSynchronize || threwException)
                 {
                     writer.Seek(positionBeforeWrite);
+                    // Truncate back to the size before
+                    writer.Truncate();
                     return false;
                 }
                 else