diff --git a/access/http/handler.go b/access/http/handler.go
index f1f5138a4..99a16a0f3 100644
--- a/access/http/handler.go
+++ b/access/http/handler.go
@@ -398,7 +398,7 @@ func (h *httpHandler) getExecutionResults(
 	u := h.mustBuildURL("/execution_results", opts...)
 
 	q := u.Query()
-	q.Add("block_ids", strings.Join(blockIDs, ","))
+	q.Add("block_id", strings.Join(blockIDs, ","))
 	u.RawQuery = q.Encode()
 
 	var results []models.ExecutionResult