diff --git a/rootdir/etc/init.mt6785.rc b/rootdir/etc/init.mt6785.rc
index f30eb78..34e89d8 100644
--- a/rootdir/etc/init.mt6785.rc
+++ b/rootdir/etc/init.mt6785.rc
@@ -48,7 +48,7 @@ on init
     write /dev/cpuset/foreground/cpus 0-7
     write /dev/cpuset/foreground/boost/cpus 0-7
     write /dev/cpuset/background/cpus 0-3
-    write /dev/cpuset/system-background/cpus 0-5
+    write /dev/cpuset/system-background/cpus 0-3
     write /dev/cpuset/top-app/cpus 0-7
 
 on late-init