diff --git a/lib/kubernetes-deploy/options_helper.rb b/lib/kubernetes-deploy/options_helper.rb
index 51ca60435..f3130ed03 100644
--- a/lib/kubernetes-deploy/options_helper.rb
+++ b/lib/kubernetes-deploy/options_helper.rb
@@ -26,7 +26,7 @@ def default_template_dir(template_dir)
           template_dir = File.join("config", "deploy", ENV['ENVIRONMENT'])
         end
 
-        if template_dir.blank?
+        if !template_dir || template_dir.empty?
           raise OptionsError, "Template directory is unknown. " \
             "Either specify --template-dir argument or set $ENVIRONMENT to use config/deploy/$ENVIRONMENT " \
             "as a default path."