diff --git a/INSTALL b/INSTALL
index 5c84aec..ebed884 100644
--- a/INSTALL
+++ b/INSTALL
@@ -16,3 +16,4 @@ SHOULD WORK ON:
 WORKS NOT ON:
  * Ubuntu 14.04 (initscript.sysv doesn't interrupt boot process)
  * Systems with boot splash (I think)
+ * Systems with openrc/sysv-init and parallel boot
diff --git a/README b/README
index 81690eb..8dad880 100644
--- a/README
+++ b/README
@@ -12,4 +12,6 @@ Run "hashboot.sh recover" to replace corrupted files with the backup
 
 A backup is stored in /var/cache/bootbackup.tar.gz
 
+You can't use the openrc/sysv init scripts with parallel boot.
+
 Detailed documentation is in the sourcecode.
diff --git a/hashboot-9999.ebuild b/hashboot-9999.ebuild
index 9d5a4ab..3105e07 100644
--- a/hashboot-9999.ebuild
+++ b/hashboot-9999.ebuild
@@ -31,6 +31,11 @@ src_unpack() {
 }
 
 src_prepare() {
+	if grep -q '^rc_parallel="YES"' /etc/rc.conf
+	then
+		ewarn "hashboot does not work properly with parallel boot enabled."
+	fi
+	
 	mkdir init
 	mv initscript.openrc init/hashboot
 	mv LICENSE HUG-WARE