diff --git a/manifests/init.pp b/manifests/init.pp
index 81d5b62..2c6d937 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -45,6 +45,9 @@ class ifort (
   $ifort_install_script_path  = $ifort::params::ifort_install_script_path,
 ) inherits ifort::params {
 
+  validate_absolute_path($ifort::ifort_pkg_path)
+  validate_absolute_path($ifort::ifort_install_script_path)
+
   include ifort::install
 
 }