diff --git a/Makefile b/Makefile
index f60212a0412c8a..9c1382204740af 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 VERSION = 5
 PATCHLEVEL = 12
 SUBLEVEL = 5
-EXTRAVERSION =
+EXTRAVERSION = s1
 NAME = Frozen Wasteland
 
 # *DOCUMENTATION*