diff --git a/ChangeLog b/ChangeLog
index 7b1ff7024d05925fdfed26aca5336cff8f14839f..76032de44b995b52327b2339500916bdd5879ae9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Jan 24 19:23:36 1992  Per Cederqvist  (ceder at robin)
+
+	* (scripts/install-includes.make): Install include files without
+	  read permisson, to prevent editing of the copies.
+
 Sun Jan  5 19:05:31 1992  Per Cederqvist  (ceder at lysator)
 
 	* (INSTALL): Stronger warning about using -lresolv on SunOS 4.1.1.
diff --git a/scripts/install-includes.make b/scripts/install-includes.make
index 13a96c14b0e582080a860ebd4f5d5564eb9e4984..69437379efebc5ab4ec453a4eae4bac6aeeae258 100644
--- a/scripts/install-includes.make
+++ b/scripts/install-includes.make
@@ -1,5 +1,5 @@
 #
-# $Id: install-includes.make,v 1.2 1991/09/15 09:58:29 linus Exp $
+# $Id: install-includes.make,v 1.3 1992/01/24 18:29:27 ceder Exp $
 # Copyright (C) 1991  Lysator Academic Computer Association.
 #
 # This file is part of the LysKOM server.
@@ -27,5 +27,7 @@ includes:
 	for i in $(INSTALL-HDRS);\
 	do	\
 		( cmp $$i $(INCLUDEDIR)/$$i 2>/dev/null ) \
-		  || cp $$i $(INCLUDEDIR)/$$i; \
+		  || ( $(RM) $(INCLUDEDIR)/$$i; \
+			cp $$i $(INCLUDEDIR)/$$i; \
+			chmod a-w $(INCLUDEDIR)/$$i ) \
 	done