diff --git a/README.adoc b/README.adoc
index 6d72d27..83fdadd 100644
--- a/README.adoc
+++ b/README.adoc
@@ -2156,6 +2156,12 @@ or with our shortcut:
 /conf.sh
 ....
 
+or to conveniently grep for a specific option:
+
+....
+/conf.sh CONFIG_IKCONFIG
+....
+
 This is enabled by:
 
 ....
diff --git a/rootfs_overlay/conf.sh b/rootfs_overlay/conf.sh
index 4cb23a8..5f6086e 100755
--- a/rootfs_overlay/conf.sh
+++ b/rootfs_overlay/conf.sh
@@ -1,2 +1,2 @@
 #!/bin/sh
-zcat /proc/config.gz
+zcat /proc/config.gz | grep "${1:-}"