diff --git a/020_bootchart.sh b/020_bootchart.sh
index bdaf593..e84b844 100644
--- a/020_bootchart.sh
+++ b/020_bootchart.sh
@@ -1,6 +1,6 @@
 apt-get install -y bootchart2 pybootchartgui
 
-sed -i "s|^GRUB_CMDLINE_LINUX=\"\(.*\)\"|GRUB_CMDLINE_LINUX=\"\1 initcall_debug printk.time=y init=/sbin/bootchartd\"|" /etc/default/grub
+sed -i 's|^GRUB_CMDLINE_LINUX="\(.*\)"|GRUB_CMDLINE_LINUX="\1 initcall_debug printk.time=y init=/sbin/bootchartd"|' /etc/default/grub
 
 update-grub