diff --git a/manifests/init.pp b/manifests/init.pp
index 2c3932f..85ae44f 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -83,7 +83,7 @@
     Class['passenger::config']
   }
 
-  if type($include_build_tools) == 'string' {
+  if type3x($include_build_tools) == 'string' {
     $include_build_tools_real = str2bool($include_build_tools)
   } else {
     $include_build_tools_real = $include_build_tools