diff --git a/Makefile.am b/Makefile.am
index 147c8db..66474b8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-# $Id: foo$
+# $Id$
 
 SUBDIRS = src examples test doc
 DIST_SUBDIRS = $(SUBDIRS) autotools debian
diff --git a/autotools/Makefile.am b/autotools/Makefile.am
index 547df64..fbbab2d 100644
--- a/autotools/Makefile.am
+++ b/autotools/Makefile.am
@@ -1 +1 @@
-# $Id: foo$
+# $Id$
diff --git a/debian/Makefile.am b/debian/Makefile.am
index fdf9d63..af6422e 100644
--- a/debian/Makefile.am
+++ b/debian/Makefile.am
@@ -1,3 +1,3 @@
-# $Id: foo$
+# $Id$
 
 EXTRA_DIST = changelog compat control copyright rules
diff --git a/doc/Makefile.am b/doc/Makefile.am
index fa045f1..bdf95ab 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,4 +1,4 @@
-# $Id: foo$
+# $Id$
 
 EXTRA_DIST = doxygen.cfg.in footer.html header.html $(man_MANS)
 
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 9d655ed..8c0a117 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1,4 +1,4 @@
-# $Id: foo$
+# $Id$
 
 pkgdata_DATA = caca.txt
 
diff --git a/src/Makefile.am b/src/Makefile.am
index 0a31331..3759a92 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,4 +1,4 @@
-# $Id: foo$
+# $Id$
 
 include_HEADERS = caca.h
 
diff --git a/test/Makefile.am b/test/Makefile.am
index ce36bf3..c69d5d6 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -1,4 +1,4 @@
-# $Id: foo$
+# $Id$
 
 noinst_PROGRAMS = dithering event hsv optipal spritedit