diff --git a/artiq/frontend/artiq_ddb_template.py b/artiq/frontend/artiq_ddb_template.py
index e55637d37..376467d75 100755
--- a/artiq/frontend/artiq_ddb_template.py
+++ b/artiq/frontend/artiq_ddb_template.py
@@ -58,7 +58,7 @@ def process_header(output, description):
                 "arguments": {{
                     "host": core_addr,
                     "ref_period": {ref_period},
-                    "analyzer_proxy": "core_analyzer"
+                    "analyzer_proxy": "core_analyzer",
                     "target": "{cpu_target}",
                     "satellite_cpu_targets": {{}}
                 }},