diff --git a/tool/net/help.txt b/tool/net/help.txt
index 03c054d23..128a0feb7 100644
--- a/tool/net/help.txt
+++ b/tool/net/help.txt
@@ -554,6 +554,12 @@ HOOKS
           each time redbean reaps a child connection process using wait4().
           This won't be called in uniprocess mode.
 
+  OnServerHeartbeat()
+          If this function is defined it'll be called from the main process
+          on each server heartbeat. The heartbeat interval is configurable
+          with ProgramHeartbeatInterval. If this hook is defined, then
+          `/.heartbeat.lua` is not called.
+
   OnServerListen(socketdescriptor:int,serverip:int,serverport:int) → bool
           If this function is defined it'll be called from the main process
           before redbean starts listening on a port. This hook can be used
diff --git a/tool/net/redbean.c b/tool/net/redbean.c
index dc9b3c48f..c32594f34 100644
--- a/tool/net/redbean.c
+++ b/tool/net/redbean.c
@@ -5745,7 +5745,11 @@ static void HandleHeartbeat(void) {
   Reindex();
   getrusage(RUSAGE_SELF, &shared->server);
 #ifndef STATIC
-  LuaRunAsset("/.heartbeat.lua", false);
+  if (IsHookDefined("OnServerHeartbeat")) {
+    CallSimpleHook("OnServerHeartbeat");
+  } else {
+    LuaRunAsset("/.heartbeat.lua", false);
+  }
   CollectGarbage();
 #endif
   for (i = 1; i < servers.n; ++i) {