diff --git a/ee/api/chalicelib/core/metrics.py b/ee/api/chalicelib/core/metrics.py
index d9a81cc91..62a1fbb27 100644
--- a/ee/api/chalicelib/core/metrics.py
+++ b/ee/api/chalicelib/core/metrics.py
@@ -464,7 +464,7 @@ def get_slowest_images(project_id, startTimestamp=TimeUTC.now(delta_days=-1),
                         FROM resources {"INNER JOIN sessions_metadata USING(session_id)" if len(meta_condition) > 0 else ""} 
                         WHERE {" AND ".join(ch_sub_query)} AND resources.duration>0
                         GROUP BY resources.url ORDER BY avg DESC LIMIT 10;"""
-        params = {"project_id": project_id, "startTimestamp": startTimestamp,
+        params = {"step_size": step_size, "project_id": project_id, "startTimestamp": startTimestamp,
                   "endTimestamp": endTimestamp, **__get_constraint_values(args)}
         rows = ch.execute(query=ch_query, params=params)
 
diff --git a/ee/api/chalicelib/core/metrics_new.py b/ee/api/chalicelib/core/metrics_new.py
index 2a4e0c236..423323f76 100644
--- a/ee/api/chalicelib/core/metrics_new.py
+++ b/ee/api/chalicelib/core/metrics_new.py
@@ -474,7 +474,7 @@ def get_slowest_images(project_id, startTimestamp=TimeUTC.now(delta_days=-1),
                         FROM {sessions_helper.get_main_resources_table(startTimestamp)} AS resources 
                         WHERE {" AND ".join(ch_sub_query)} AND resources.duration>0
                         GROUP BY resources.url ORDER BY avg DESC LIMIT 10;"""
-        params = {"project_id": project_id, "startTimestamp": startTimestamp,
+        params = {"step_size": step_size, "project_id": project_id, "startTimestamp": startTimestamp,
                   "endTimestamp": endTimestamp, **__get_constraint_values(args)}
         rows = ch.execute(query=ch_query, params=params)