diff --git a/djgpp/config.site b/djgpp/config.site
index 01babe48..a5453708 100644
--- a/djgpp/config.site
+++ b/djgpp/config.site
@@ -56,6 +56,18 @@ ac_cv_path_EMACS=${EMACS='/dev/env/DJDIR/gnu/emacs/bin/emacs'}
 # A sane default for m4.
 ac_cv_path_M4=${M4='/dev/env/DJDIR/bin/m4'}
 
+# A sane default for grep.
+ac_cv_path_GREP=${GREP='/dev/env/DJDIR/bin/grep'}
+
+# A sane default for egrep.
+ac_cv_path_EGREP=${EGREP='/dev/env/DJDIR/bin/egrep'}
+
+# A sane default for fgrep.
+ac_cv_path_FGREP=${FGREP='/dev/env/DJDIR/bin/fgrep'}
+
+# A sane default for sed.
+ac_cv_path_SED=${SED='/dev/env/DJDIR/bin/sed'}
+
 # These are set here so the generated libtool will be good
 # for every DJGPP installation, not only the one where the
 # package was configured.