diff --git a/ansible/templates/google_symptoms-params-prod.json.j2 b/ansible/templates/google_symptoms-params-prod.json.j2
index 70929202e..f91fe9606 100644
--- a/ansible/templates/google_symptoms-params-prod.json.j2
+++ b/ansible/templates/google_symptoms-params-prod.json.j2
@@ -5,7 +5,7 @@
   },
   "indicator": {
     "export_start_date": "2020-02-20",
-    "num_export_days": 14,
+    "num_export_days": null,
     "bigquery_credentials": {
       "type": "{{ google_symptoms_account_type }}",
       "project_id": "{{ google_symptoms_project_id }}",
diff --git a/google_symptoms/delphi_google_symptoms/run.py b/google_symptoms/delphi_google_symptoms/run.py
index 2ef71c30b..569ec1821 100644
--- a/google_symptoms/delphi_google_symptoms/run.py
+++ b/google_symptoms/delphi_google_symptoms/run.py
@@ -7,6 +7,7 @@
 import time
 from datetime import datetime
 from itertools import product
+import covidcast
 
 import numpy as np
 from delphi_utils import (
@@ -46,7 +47,13 @@ def run_module(params):
     export_start_date = datetime.strptime(
         params["indicator"]["export_start_date"], "%Y-%m-%d")
     export_dir = params["common"]["export_dir"]
-    num_export_days = params["indicator"].get("num_export_days", "all")
+    num_export_days = params["indicator"]["num_export_days"]
+
+    if num_export_days is None:
+        # Get number of days based on what's missing from the API.
+        metadata = covidcast.metadata()
+        gs_metadata = metadata[(metadata.data_source == "google-symptoms")]
+        num_export_days = max(gs_metadata.min_lag)
 
     logger = get_structured_logger(
         __name__, filename=params["common"].get("log_filename"),
diff --git a/google_symptoms/params.json.template b/google_symptoms/params.json.template
index 29b346b32..2970c29af 100644
--- a/google_symptoms/params.json.template
+++ b/google_symptoms/params.json.template
@@ -5,7 +5,7 @@
   },
   "indicator": {
     "export_start_date": "2020-02-20",
-    "num_export_days": 14,
+    "num_export_days": null,
     "bigquery_credentials": {}
   },
   "validation": {