diff --git a/source/build/include/build.h b/source/build/include/build.h
index da4745423..bf5f1f8eb 100644
--- a/source/build/include/build.h
+++ b/source/build/include/build.h
@@ -4,6 +4,7 @@
 //
 // This file has been modified from Ken Silverman's original release
 // by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #pragma once
 
diff --git a/source/build/include/cache1d.h b/source/build/include/cache1d.h
index f075d956c..70b42b64e 100644
--- a/source/build/include/cache1d.h
+++ b/source/build/include/cache1d.h
@@ -1,4 +1,10 @@
-// cache1d.h
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #ifndef cache1d_h_
 #define cache1d_h_
diff --git a/source/build/include/clip.h b/source/build/include/clip.h
index d7ed8effc..07ee0d65a 100644
--- a/source/build/include/clip.h
+++ b/source/build/include/clip.h
@@ -1,3 +1,11 @@
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
+
 #pragma once
 
 #ifndef clip_h_
diff --git a/source/build/include/editor.h b/source/build/include/editor.h
index fb1a8a5e5..3d83325c4 100644
--- a/source/build/include/editor.h
+++ b/source/build/include/editor.h
@@ -1,6 +1,10 @@
 // "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
 // Ken Silverman's official web site: "http://www.advsys.net/ken"
 // See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #ifndef editor_h_
 #define editor_h_
diff --git a/source/build/include/mmulti.h b/source/build/include/mmulti.h
index 2e00bffcc..42b2f1298 100644
--- a/source/build/include/mmulti.h
+++ b/source/build/include/mmulti.h
@@ -1,4 +1,10 @@
-// mmulti.h
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #ifndef mmulti_h_
 #define mmulti_h_
diff --git a/source/build/include/palette.h b/source/build/include/palette.h
index 1439af39f..f4a204f61 100644
--- a/source/build/include/palette.h
+++ b/source/build/include/palette.h
@@ -1,3 +1,11 @@
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
+
 #pragma once
 
 #ifndef palette_h_
diff --git a/source/build/include/pragmas.h b/source/build/include/pragmas.h
index f8e588808..9beb42bb8 100644
--- a/source/build/include/pragmas.h
+++ b/source/build/include/pragmas.h
@@ -1,6 +1,10 @@
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
 // This file has been modified from Ken Silverman's original release
 // by Jonathon Fowler (jf@jonof.id.au)
-
+// by the EDuke32 team (development@voidpoint.com)
 
 #ifndef pragmas_h_
 #define pragmas_h_
diff --git a/source/build/src/2d.cpp b/source/build/src/2d.cpp
index f581714cc..43b442548 100644
--- a/source/build/src/2d.cpp
+++ b/source/build/src/2d.cpp
@@ -1,3 +1,11 @@
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
+
 #include "build.h"
 #include "editor.h"
 
diff --git a/source/build/src/a-c.cpp b/source/build/src/a-c.cpp
index 5d3094136..cf9881aba 100644
--- a/source/build/src/a-c.cpp
+++ b/source/build/src/a-c.cpp
@@ -5,6 +5,10 @@
 // "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
 // Ken Silverman's official web site: "http://www.advsys.net/ken"
 // See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #include "a.h"
 #include "pragmas.h"
diff --git a/source/build/src/a.masm b/source/build/src/a.masm
index 5d92115f1..48592ae3e 100644
--- a/source/build/src/a.masm
+++ b/source/build/src/a.masm
@@ -1,6 +1,10 @@
 ; "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
 ; Ken Silverman's official web site: "http://www.advsys.net/ken"
 ; See the included license file "BUILDLIC.TXT" for license info.
+;
+; This file has been modified from Ken Silverman's original release
+; by Jonathon Fowler (jf@jonof.id.au)
+; by the EDuke32 team (development@voidpoint.com)
 
 .586P
 ;.8087
diff --git a/source/build/src/a.nasm b/source/build/src/a.nasm
index 4e1f2e405..ee573fc95 100644
--- a/source/build/src/a.nasm
+++ b/source/build/src/a.nasm
@@ -4,6 +4,7 @@
 ;
 ; This file has been modified from Ken Silverman's original release
 ; by Jonathon Fowler (jf@jonof.id.au)
+; by the EDuke32 team (development@voidpoint.com)
 
 %ifidn __OUTPUT_FORMAT__, x64
 %define ASM_x86_64
diff --git a/source/build/src/build.cpp b/source/build/src/build.cpp
index d0ff92b62..f07ad9670 100644
--- a/source/build/src/build.cpp
+++ b/source/build/src/build.cpp
@@ -4,6 +4,7 @@
 //
 // This file has been modified from Ken Silverman's original release
 // by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #include "build.h"
 #include "compat.h"
diff --git a/source/build/src/cache1d.cpp b/source/build/src/cache1d.cpp
index b3589dc02..4c28fe409 100644
--- a/source/build/src/cache1d.cpp
+++ b/source/build/src/cache1d.cpp
@@ -4,6 +4,7 @@
 //
 // This file has been modified from Ken Silverman's original release
 // by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #include "compat.h"
 
diff --git a/source/build/src/clip.cpp b/source/build/src/clip.cpp
index e615ade76..6bb7d51b8 100644
--- a/source/build/src/clip.cpp
+++ b/source/build/src/clip.cpp
@@ -1,3 +1,11 @@
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
+
 #include "build.h"
 #include "baselayer.h"
 #include "engine_priv.h"
diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index a95c14cad..260609f49 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -4,6 +4,7 @@
 //
 // This file has been modified from Ken Silverman's original release
 // by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #define ENGINE
 
diff --git a/source/build/src/engine_priv.h b/source/build/src/engine_priv.h
index 3fcc42786..9536f215c 100644
--- a/source/build/src/engine_priv.h
+++ b/source/build/src/engine_priv.h
@@ -1,3 +1,11 @@
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
+
 #pragma once
 
 #ifndef ENGINE_PRIV_H
diff --git a/source/build/src/mmulti_null.cpp b/source/build/src/mmulti_null.cpp
index 313ea1496..51ae32f79 100644
--- a/source/build/src/mmulti_null.cpp
+++ b/source/build/src/mmulti_null.cpp
@@ -4,6 +4,7 @@
 //
 // This file has been modified from Ken Silverman's original release
 // by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #include "compat.h"
 #include "mmulti.h"
diff --git a/source/build/src/palette.cpp b/source/build/src/palette.cpp
index 8f81d51af..a7ad912ed 100644
--- a/source/build/src/palette.cpp
+++ b/source/build/src/palette.cpp
@@ -1,3 +1,11 @@
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
+
 #include "compat.h"
 #include "build.h"
 #include "engine_priv.h"
diff --git a/source/build/src/tiles.cpp b/source/build/src/tiles.cpp
index e3baea0ef..a374a36dc 100644
--- a/source/build/src/tiles.cpp
+++ b/source/build/src/tiles.cpp
@@ -1,3 +1,10 @@
+// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
+// Ken Silverman's official web site: "http://www.advsys.net/ken"
+// See the included license file "BUILDLIC.TXT" for license info.
+//
+// This file has been modified from Ken Silverman's original release
+// by Jonathon Fowler (jf@jonof.id.au)
+// by the EDuke32 team (development@voidpoint.com)
 
 #include "compat.h"
 #include "build.h"