diff --git a/include/functions.sh b/include/functions.sh
index 1d06249..c39b6b7 100644
--- a/include/functions.sh
+++ b/include/functions.sh
@@ -179,6 +179,10 @@
     local cpu=$1
     local dirpath=$CPU_PATH/$cpu
 
+    if [ "$cpu" = "cpu0" ]; then
+	return 0
+    fi
+
     echo 1 > $dirpath/online
 }
 
@@ -186,6 +190,10 @@
     local cpu=$1
     local dirpath=$CPU_PATH/$cpu
 
+    if [ "$cpu" = "cpu0" ]; then
+	return 0
+    fi
+
     echo 0 > $dirpath/online
 }