diff --git a/README b/README
index 9cbe7b9..0057949 100644
--- a/README
+++ b/README
@@ -90,7 +90,7 @@ form a base system similar to busybox but much smaller and suckless.
 Building
 --------
 
-You need GNU make to build sbase.
+You need GNU make to build sbase on OpenBSD.
 
 To  build sbase,  simply  type  make.  You  may  have  to fiddle  with
 config.mk depending on your system.