diff --git a/prospect-monolithic/mux.rkt b/prospect-monolithic/mux.rkt
index a2ec45b..5021888 100644
--- a/prospect-monolithic/mux.rkt
+++ b/prospect-monolithic/mux.rkt
@@ -82,7 +82,7 @@
   (define new-routing-table (mux-routing-table new-m))
   (define echo-cancelled-assertions (echo-cancelled-routing-table new-m))
   (define affected-pids
-    (let ((pids (compute-affected-pids old-routing-table aggregate-assertions))) ;; hmm
+    (let ((pids (compute-affected-pids old-routing-table aggregate-assertions)))
       (tset-remove (tset-add pids label) 'meta))) ;; TODO: removing meta is weird
   (values (for/list [(pid (tset->list affected-pids))]
             (cons pid (scn (biased-intersection echo-cancelled-assertions
diff --git a/prospect/mux.rkt b/prospect/mux.rkt
index 4c508ea..e4ab608 100644
--- a/prospect/mux.rkt
+++ b/prospect/mux.rkt
@@ -87,7 +87,7 @@
   (define old-routing-table (mux-routing-table old-m))
   (define new-routing-table (mux-routing-table new-m))
   (define affected-pids
-    (let ((pids (compute-affected-pids old-routing-table delta)))
+    (let ((pids (compute-affected-pids old-routing-table delta-aggregate/no-echo)))
       (tset-remove (tset-add pids label) 'meta))) ;; TODO: removing meta is weird
   (values (for/list [(pid (tset->list affected-pids))]
             (cond [(equal? pid label)