diff --git a/templates/ssl_ca_cert.erb b/templates/ssl_ca_cert.erb
index 525efa0..d254c70 100644
--- a/templates/ssl_ca_cert.erb
+++ b/templates/ssl_ca_cert.erb
@@ -1,3 +1,3 @@
-<% unless @ne_ssl_ca_cert_pem.nil -%>
+<% unless @ne_ssl_ca_cert_pem.undef -%>
 <%= @ne_ssl_ca_cert_pem %>
 <% end -%>
\ No newline at end of file
diff --git a/templates/ssl_cert.erb b/templates/ssl_cert.erb
index f74399b..a5534c0 100644
--- a/templates/ssl_cert.erb
+++ b/templates/ssl_cert.erb
@@ -1,3 +1,3 @@
-<% unless @ne_ssl_cert_pem.nil -%>
+<% unless @ne_ssl_cert_pem.undef -%>
 <%= @ne_ssl_cert_pem %>
 <% end -%>
\ No newline at end of file
diff --git a/templates/ssl_privatekey.erb b/templates/ssl_privatekey.erb
index 3660917..5b8df64 100644
--- a/templates/ssl_privatekey.erb
+++ b/templates/ssl_privatekey.erb
@@ -1,3 +1,3 @@
-<% unless @ne_ssl_privatekey_pem.nil -%>
+<% unless @ne_ssl_privatekey_pem.undef -%>
 <%= @ne_ssl_privatekey_pem %>
 <% end -%>
\ No newline at end of file