diff --git a/changelog.d/4305.bugfix b/changelog.d/4305.bugfix
new file mode 100644
index 000000000..499fb8207
--- /dev/null
+++ b/changelog.d/4305.bugfix
@@ -0,0 +1 @@
+The metric synapse_admin_mau:current previously did not update when config.mau_stats_only was set to True
diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index 023e32fed..f2064f9d0 100755
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -537,7 +537,7 @@ def run(hs):
         )
 
     start_generate_monthly_active_users()
-    if hs.config.limit_usage_by_mau:
+    if hs.config.limit_usage_by_mau or hs.config.mau_stats_only:
         clock.looping_call(start_generate_monthly_active_users, 5 * 60 * 1000)
     # End of monthly active user settings