diff --git a/lib/omnibus/templating.rb b/lib/omnibus/templating.rb
index 47016cd70..d6b454d95 100644
--- a/lib/omnibus/templating.rb
+++ b/lib/omnibus/templating.rb
@@ -36,8 +36,7 @@ def self.included(base)
     #   the list of variables to pass to the template
     #
     def render_template_content(source, variables = {})
-      template = ERB.new(File.read(source), nil, "-")
-
+      template = ERB.new(File.read(source), trim_mode: "-")
       struct =
         if variables.empty?
           Struct.new("Empty")