diff --git a/gen/wpilibj_frcnetcomm.py b/gen/wpilibj_frcnetcomm.py
index f9fd37facf..c15f5c9ac3 100755
--- a/gen/wpilibj_frcnetcomm.py
+++ b/gen/wpilibj_frcnetcomm.py
@@ -67,6 +67,8 @@ def main():
 
         # Write preamble
         temp.write("""
+// Autogenerated by wpilibj_frcnetcomm.py. Do not manually edit this file.
+
 package edu.wpi.first.wpilibj.hal;
 
 /**
diff --git a/hal/src/main/java/edu/wpi/first/wpilibj/hal/FRCNetComm.java b/hal/src/main/java/edu/wpi/first/wpilibj/hal/FRCNetComm.java
index f82bbccb95..b70394b822 100644
--- a/hal/src/main/java/edu/wpi/first/wpilibj/hal/FRCNetComm.java
+++ b/hal/src/main/java/edu/wpi/first/wpilibj/hal/FRCNetComm.java
@@ -5,6 +5,8 @@
 /* the project.                                                               */
 /*----------------------------------------------------------------------------*/
 
+// Autogenerated by wpilibj_frcnetcomm.py. Do not manually edit this file.
+
 package edu.wpi.first.wpilibj.hal;
 
 /**