diff --git a/src/ai/ai.h b/src/ai/ai.h
index a0a4c57935..57f198eb96 100644
--- a/src/ai/ai.h
+++ b/src/ai/ai.h
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #ifndef AI_H
 #define AI_H
 
diff --git a/src/blitter/32bpp_anim.cpp b/src/blitter/32bpp_anim.cpp
index 5d937d997e..0533d9fbba 100644
--- a/src/blitter/32bpp_anim.cpp
+++ b/src/blitter/32bpp_anim.cpp
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #include "../stdafx.h"
 #include "../zoom.hpp"
 #include "../gfx.h"
diff --git a/src/blitter/32bpp_base.cpp b/src/blitter/32bpp_base.cpp
index f092599271..ee1b76d1c8 100644
--- a/src/blitter/32bpp_base.cpp
+++ b/src/blitter/32bpp_base.cpp
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #include "../stdafx.h"
 #include "../gfx.h"
 #include "32bpp_base.hpp"
diff --git a/src/blitter/32bpp_optimized.cpp b/src/blitter/32bpp_optimized.cpp
index 460e7ad0e3..0535dd6400 100644
--- a/src/blitter/32bpp_optimized.cpp
+++ b/src/blitter/32bpp_optimized.cpp
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #include "../stdafx.h"
 #include "../zoom.hpp"
 #include "../gfx.h"
diff --git a/src/blitter/32bpp_simple.cpp b/src/blitter/32bpp_simple.cpp
index b5afea9eb0..f007890759 100644
--- a/src/blitter/32bpp_simple.cpp
+++ b/src/blitter/32bpp_simple.cpp
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #include "../stdafx.h"
 #include "../zoom.hpp"
 #include "../gfx.h"
diff --git a/src/blitter/8bpp_base.cpp b/src/blitter/8bpp_base.cpp
index 269170cb23..541e881762 100644
--- a/src/blitter/8bpp_base.cpp
+++ b/src/blitter/8bpp_base.cpp
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #include "../stdafx.h"
 #include "../gfx.h"
 #include "8bpp_base.hpp"
diff --git a/src/core/math_func.hpp b/src/core/math_func.hpp
index 82a4799acd..c05e7ffebb 100644
--- a/src/core/math_func.hpp
+++ b/src/core/math_func.hpp
@@ -1,6 +1,6 @@
-/* $Id */
+/* $Id$ */
 
-/** @file math_func.hpp */
+/** @file math_func.hpp Integer math functions */
 
 #ifndef MATH_FUNC_HPP
 #define MATH_FUNC_HPP
diff --git a/src/road.cpp b/src/road.cpp
index 20472cac95..dd0d7f87f6 100644
--- a/src/road.cpp
+++ b/src/road.cpp
@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #include "stdafx.h"
 #include "openttd.h"
 #include "functions.h"