diff --git a/changelog.d/4305.bugfix b/changelog.d/4305.bugfix
new file mode 100644
index 0000000000000000000000000000000000000000..499fb8207766b1180d9dc8af9c504888fd8b184f
--- /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 023e32fed29a7b6aa91c974c069cf144b0c47dcf..f2064f9d0ccf3a1e8a23a5be00e45ed685e68859 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