diff --git a/mkconfig b/mkconfig
index 7c9aa74..324703f 100755
--- a/mkconfig
+++ b/mkconfig
@@ -21,7 +21,7 @@ options=""
 
 if [ \( $# -eq 2 \) -a \( "$1" = "-A" \) ] ; then
 	# Automatic mode
-	line=`egrep -i "^[[:space:]]*${2}[[:space:]]" boards.cfg` || {
+	line=`egrep "^[[:space:]]*${2}[[:space:]]" boards.cfg` || {
 		echo "make: *** No rule to make target \`$2_config'.  Stop." >&2
 		exit 1
 	}