diff --git a/Makefile b/Makefile
index a36819b045a6..02188bbafdf9 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 VERSION = 6
 PATCHLEVEL = 6
 SUBLEVEL = 21
-EXTRAVERSION =
+EXTRAVERSION = -hardened1
 NAME = Hurr durr I'ma ninja sloth
 
 # *DOCUMENTATION*