diff --git a/magnum_cluster_api/utils.py b/magnum_cluster_api/utils.py
index 735dec95..11370edf 100644
--- a/magnum_cluster_api/utils.py
+++ b/magnum_cluster_api/utils.py
@@ -201,8 +201,8 @@ def generate_containerd_config(
 
 def generate_systemd_proxy_config(cluster: magnum_objects.Cluster):
     if (
-        cluster.cluster_template.http_proxy != ""
-        or cluster.cluster_template.https_proxy != ""
+        cluster.cluster_template.http_proxy is not None
+        or cluster.cluster_template.https_proxy is not None
     ):
         return textwrap.dedent(
             """\
@@ -225,8 +225,8 @@ def generate_systemd_proxy_config(cluster: magnum_objects.Cluster):
 
 def generate_apt_proxy_config(cluster: magnum_objects.Cluster):
     if (
-        cluster.cluster_template.http_proxy != ""
-        or cluster.cluster_template.https_proxy != ""
+        cluster.cluster_template.http_proxy is not None
+        or cluster.cluster_template.https_proxy is not None
     ):
         return textwrap.dedent(
             """\