diff --git a/changelogs/unreleased/1499-fix_slice_ip_whitelist.yml b/changelogs/unreleased/1499-fix_slice_ip_whitelist.yml
new file mode 100644
index 0000000000000000000000000000000000000000..e9fc4f1ed935aa762e7a4198dd0bc057521137a1
--- /dev/null
+++ b/changelogs/unreleased/1499-fix_slice_ip_whitelist.yml
@@ -0,0 +1,5 @@
+---
+title: '1499/Fix monitoring ip_whitelist : change kind comparison to slice'
+merge_request: 993
+author:
+type: fixed
diff --git a/charts/gitlab/charts/unicorn/templates/configmap.yml b/charts/gitlab/charts/unicorn/templates/configmap.yml
index 42b533fb76a1534fd6a08567a3eeee91b330c42a..a0183fc9e28095febd92109f777cab028f091134 100644
--- a/charts/gitlab/charts/unicorn/templates/configmap.yml
+++ b/charts/gitlab/charts/unicorn/templates/configmap.yml
@@ -165,7 +165,7 @@ data:
       webpack:
       monitoring:
         ip_whitelist:
-          {{- if kindIs "array" .Values.monitoring.ipWhitelist }}
+          {{- if kindIs "slice" .Values.monitoring.ipWhitelist }}
           {{ toYaml .Values.monitoring.ipWhitelist | nindent 10 | trim }}
           {{- end }}
         sidekiq_exporter: