diff --git a/mk-sbuild b/mk-sbuild
index bba3f14..5ca3744 100755
--- a/mk-sbuild
+++ b/mk-sbuild
@@ -280,7 +280,7 @@ esac
 # Is the specified release known to debootstrap?
 variant_opt="--variant=buildd"
 if [ ! -r "/usr/share/debootstrap/scripts/$RELEASE" ]; then
-    echo "Specified release not known to debootstrap" >&2
+    echo "Specified release ($RELEASE) not known to debootstrap" >&2
     exit 1
 fi