diff --git a/heka/files/decoder/sandbox.toml b/heka/files/decoder/sandbox.toml
index f95737a..8c0c9fb 100644
--- a/heka/files/decoder/sandbox.toml
+++ b/heka/files/decoder/sandbox.toml
@@ -21,3 +21,10 @@
 {% if values.output_limit is defined %}
 output_limit = "{{ values.output_limit }}"
 {%- endif %}
+
+{% if values.config is defined %}
+config = [
+{% for k,v in values.config.iteritems() %}
+{{ k }} = {{ v }} ]
+{%- endfor %}
+{%- endif %}