diff --git a/include/binaries b/include/binaries
index b495013c..a2b4895a 100644
--- a/include/binaries
+++ b/include/binaries
@@ -338,7 +338,7 @@
 
 	# If grep is capable of extended regexp, use that instead of egrep to avoid annoying warning
 	if [ "${GREPBINARY:-}" ] ; then
-		${GREPBINARY} --help | ${GREPBINARY} -e "extended-regexp" > /dev/null
+		${GREPBINARY} --help 2> /dev/null | ${GREPBINARY} -e "extended-regexp" > /dev/null
 		if [ $? -eq 0 ] ; then
 			EGREPBINARY="${GREPBINARY} -E"
 		fi