diff --git a/scripts/make/version.sh b/scripts/make/version.sh
index 11ee165f5b8..893b67ed5be 100644
--- a/scripts/make/version.sh
+++ b/scripts/make/version.sh
@@ -136,7 +136,7 @@ in
 	# candidate branch is always based on the following version's beta branch
 	# and thus the latest beta tag will be described.
 	last_beta="$( git describe --abbrev=0 )"
-	readonly last_tag
+	readonly last_beta
 
 	# current_branch is the name of the branch currently checked out.  It's
 	# assumed to be a release candidate branch and have a name like: