diff --git a/src/test/check-missing-functions b/src/test/check-missing-functions
index cb819fc..dfc32d3 100755
--- a/src/test/check-missing-functions
+++ b/src/test/check-missing-functions
@@ -3,11 +3,11 @@
 set -e
 
 # functions already in src/proxmox-acme
-PRESENT=$(awk 'BEGIN{ORS="|";} /^_/{ gsub(/\(\) {/, ""); print $0}' \
+PRESENT=$(awk 'BEGIN{ORS="\\W|";} /^_/{ gsub(/\(\) {/, ""); print $0}' \
 	../proxmox-acme | sed -r 's/\|$//')
 
 # functions defined in all plugins
-LOCAL=$(awk 'BEGIN{ORS="|";} /^_/{ gsub(/\(\) {/, ""); print $0}' \
+LOCAL=$(awk 'BEGIN{ORS="\\W|";} /^_/{ gsub(/\(\) {/, ""); print $0}' \
 	../acme.sh/dnsapi/dns*.sh | sed -r 's/\|$//')
 
 grep -P '(?<!["$])\b_[a-zA-Z0-9_-]+ ' ../acme.sh/dnsapi/dns_*sh | \
diff --git a/src/test/missing-functions.expected b/src/test/missing-functions.expected
index 467f9ac..5c2b053 100644
--- a/src/test/missing-functions.expected
+++ b/src/test/missing-functions.expected
@@ -1,3 +1,4 @@
+../acme.sh/dnsapi/dns_aws.sh:      _error "invalid domain"
 ../acme.sh/dnsapi/dns_cpanel.sh:  for _domain in $_domains; do
 ../acme.sh/dnsapi/dns_cyon.sh:  printf "%s" "${_dns_entries}" | while read -r _hash _identifier; do
 ../acme.sh/dnsapi/dns_do.sh:      for _rrid in ${_rr_list}; do