diff --git a/[refs] b/[refs]
index b468abba4204..e62b8f8815aa 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ad6ccfad6f759a5d657dabe2071a8f2a503fcc84
+refs/heads/master: 1581c1cede3b180b77aa08024c6ca406252cc21f
diff --git a/trunk/scripts/headers_check.pl b/trunk/scripts/headers_check.pl
index 56f90a480899..4414c43857ad 100644
--- a/trunk/scripts/headers_check.pl
+++ b/trunk/scripts/headers_check.pl
@@ -70,7 +70,7 @@ sub check_prototypes
 
 sub check_config
 {
-	if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9]+)[^a-zA-Z0-9]/) {
+	if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) {
 		printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n";
 	}
 }