diff --git a/site-modules/profile/files/stats_exporter/export-archive_counters.py b/site-modules/profile/files/stats_exporter/export-archive_counters.py
index 06d0afce..f1615c98 100755
--- a/site-modules/profile/files/stats_exporter/export-archive_counters.py
+++ b/site-modules/profile/files/stats_exporter/export-archive_counters.py
@@ -1,51 +1,51 @@
 #!/usr/bin/python3
 
 import requests
 import json
 import time
 
 def clean_item(item):
     """Javascript expects timestamps to be in milliseconds
        and counter values as floats
 
     """
     timestamp = int(item[0])
     counter_value = item[1]
     return [timestamp*1000, float(counter_value)]
     
 
 def get_timestamp_history(label):
     result = []
     rrd_data = []
     now = int(time.time())
     url = 'http://pergamon.internal.softwareheritage.org:9090/api/v1/query_range?'
-    url = url + 'query=sum(sql_swh_archive_object_count) by (object_type)'
+    url = url + 'query=sum(sql_swh_archive_object_count{object_type="%s"})' % label
     url = url + '&start=1544543227&end=%s&step=12h' % now
 
     # We only want to process timevalues for Source files
     if (label == "content"):
         # Historical data has already been processed for javascript usage
         # No need to clean it further
         with open("/usr/local/share/swh-data/history-counters.munin.json", "r") as f:
             rrd_data = json.load(f)[label]
 
     response = requests.get(url)
     if response.ok:
         data = response.json()
         # In contrast, Prometheus-provided data has to be adapted to
         # Javascript expectations
         result = [clean_item(i) for i in
             data['data']['result'][0]['values']]
     return rrd_data + result
 
 
 def main():
    result = {}
    for label in ['content', 'origin', 'revision']:
        result[label] = get_timestamp_history(label)
    return result
     
 
 if __name__ == '__main__':
     r = main()
     print(json.dumps(r))