diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index 09117542..48182e10 100644
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -7102,7 +7102,7 @@ static void handleSafetyTimer()
     {
         safetyTimer.start();
     }
-    else if (safetyTimer.expired(15*60*1000))
+    else if (safetyTimer.expired(900000ul))
     {
         setTargetBed(0);
         setTargetHotend(0, 0);