diff --git a/rear.spec b/rear.spec
index 8d75934..d20feb4 100644
--- a/rear.spec
+++ b/rear.spec
@@ -79,6 +79,10 @@ Professional services and support are available.
 %prep
 %autosetup -p1
 
+### Add a specific os.conf so we do not depend on LSB dependencies
+%{?fedora:echo -e "OS_VENDOR=Fedora\nOS_VERSION=%{?fedora}" >etc/rear/os.conf}
+%{?rhel:echo -e "OS_VENDOR=RedHatEnterpriseServer\nOS_VERSION=%{?rhel}" >etc/rear/os.conf}
+
 # Change /lib to /usr/lib for COPY_AS_IS
 sed -E -e "s:([\"' ])/lib:\1/usr/lib:g" \
     -i usr/share/rear/prep/GNU/Linux/*include*.sh