diff --git a/include/c.h b/include/c.h
index 86e56d25..950bca2c 100644
--- a/include/c.h
+++ b/include/c.h
@@ -1,3 +1,7 @@
+/*
+ * This header was copied from util-linux at fall 2011.
+ */
+
 /*
  * Fundamental C definitions.
  */
diff --git a/include/nls.h b/include/nls.h
index 17ce836d..fee89b2e 100644
--- a/include/nls.h
+++ b/include/nls.h
@@ -1,3 +1,7 @@
+/* 
+ * This header was copied from util-linux at fall 2011.
+ */
+
 #ifndef PROCPS_NG_NLS_H
 #define PROCPS_NG_NLS_H
 
diff --git a/include/strutils.h b/include/strutils.h
index cf521d3a..b2f9a906 100644
--- a/include/strutils.h
+++ b/include/strutils.h
@@ -1,3 +1,7 @@
+/* 
+ * This header was copied from util-linux at fall 2011.
+ */
+
 #ifndef PROCPS_NG_STRUTILS
 #define PROCPS_NG_STRUTILS
 
diff --git a/include/xalloc.h b/include/xalloc.h
index dca64254..bd02c750 100644
--- a/include/xalloc.h
+++ b/include/xalloc.h
@@ -1,3 +1,7 @@
+/* 
+ * This header was copied from util-linux at fall 2011.
+ */
+
 /*
  * General memory allocation wrappers for malloc, realloc, calloc
  * and strdup.
diff --git a/lib/strutils.c b/lib/strutils.c
index 064bdc06..53dcc75c 100644
--- a/lib/strutils.c
+++ b/lib/strutils.c
@@ -1,3 +1,7 @@
+/* 
+ * This file was copied from util-linux at fall 2011.
+ */
+
 #include <stdlib.h>
 
 #include "c.h"