diff --git a/erlang.sh b/erlang.sh
index 9ad1bdb..b716921 100755
--- a/erlang.sh
+++ b/erlang.sh
@@ -29,8 +29,8 @@ deb_suffixes=(
 )
 
 function join_by { local IFS="$1"; shift; echo "$*"; }
-ubuntu_codenames=$(join_by ',' $(IFS=','; eval echo {"${ubuntu_os[*]}"}-{"${deb_suffixes[*]}"}))
-debian_codenames=$(join_by ',' $(IFS=','; eval echo {"${debian_os[*]}"}-{"${deb_suffixes[*]}"}))
+ubuntu_codenames=$(join_by ',' $(IFS=','; eval echo {"${ubuntu_os[*]}",}-{"${deb_suffixes[*],}"}))
+debian_codenames=$(join_by ',' $(IFS=','; eval echo {"${debian_os[*]}",}-{"${deb_suffixes[*],}"}))
 
 # =================== APT repos ===============================