diff --git a/colorgrep.csh b/colorgrep.csh
index 1d9e94e..82bd09d 100644
--- a/colorgrep.csh
+++ b/colorgrep.csh
@@ -1,11 +1,8 @@
-#! /bin/csh -f
 
 # color-grep initialization
 
-set COLORS=/etc/GREP_COLORS
-
-if ( -e "$COLORS" ) then
-    set color_none=`sed -n '/^COLOR.*none/Ip' < $COLORS`
+if ( -r /etc/GREP_COLORS ) then
+    set color_none=`sed -n '/^COLOR.*none/Ip' < /etc/GREP_COLORS`
     if ( "$color_none" != '' ) then
         unset color_none
         exit
diff --git a/colorgrep.sh b/colorgrep.sh
index 5c61838..436518f 100644
--- a/colorgrep.sh
+++ b/colorgrep.sh
@@ -3,12 +3,8 @@
 # Skip the rest for noninteractive shells.
 [ -z "$PS1" ] && return
 
-COLORS=
-
-[ -e "/etc/GREP_COLORS" ] && COLORS="/etc/GREP_COLORS"
-
-if [ -n "$COLORS" ]; then
-    grep -qi "^COLOR.*none" $COLORS >/dev/null 2>/dev/null && return
+if [ -r /etc/GREP_COLORS ]; then
+    grep -qi "^COLOR.*none" /etc/GREP_COLORS >/dev/null 2>/dev/null && return
 fi
 
 alias grep='grep --color=auto' 2>/dev/null
diff --git a/grep.spec b/grep.spec
index e1e5b84..ee32b79 100644
--- a/grep.spec
+++ b/grep.spec
@@ -3,7 +3,7 @@
 Summary: Pattern matching utilities
 Name: grep
 Version: 2.7
-Release: 4%{?dist}
+Release: 5%{?dist}
 License: GPLv3+
 Group: Applications/Text
 Source: ftp://ftp.gnu.org/pub/gnu/grep/grep-%{version}.tar.xz
@@ -69,6 +69,10 @@ fi
 %{_mandir}/*/*
 
 %changelog
+* Mon Apr 04 2011 Jaroslav Škarvada <jskarvad@redhat.com> - 2.7-5
+- colorgrep scripts no longer overwrites COLORS envvar (#693058),
+  thanks to Ville Skyttä
+
 * Wed Feb 09 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 2.7-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass_Rebuild