diff --git a/rebuild-ipxe.sh b/rebuild-ipxe.sh
index 8ef978e..bd2fe65 100755
--- a/rebuild-ipxe.sh
+++ b/rebuild-ipxe.sh
@@ -16,7 +16,7 @@ cd ipxe/src
 
 sed -i \
     -e 's/^#undef.*NET_PROTO_IPV6/#define NET_PROTO_IPV6/' \
-    -e 's,//^#define.*NET_PROTO_IPV6,#define NET_PROTO_IPV6,' \
+    -e 's,^//#define.*NET_PROTO_IPV6,#define NET_PROTO_IPV6,' \
 	-e 's/^#undef.*DOWNLOAD_PROTO_HTTPS/#define  DOWNLOAD_PROTO_HTTPS/' \
 	-e 's,^//#define POWEROFF_CMD,#define POWEROFF_CMD,' \
 	-e 's,^//#define PING_CMD,#define PING_CMD,' \