diff --git a/source/configy/Read.d b/source/configy/Read.d
index a874160..ddba413 100644
--- a/source/configy/Read.d
+++ b/source/configy/Read.d
@@ -1146,6 +1146,7 @@
 
 /// Convenience function to extend a YAML path
 private string addPath (string opath, string newPart)
-{
+in(newPart.length)
+do {
     return opath.length ? format("%s.%s", opath, newPart) : newPart;
 }
diff --git a/source/configy/Test.d b/source/configy/Test.d
index 38227fe..1b04e0a 100644
--- a/source/configy/Test.d
+++ b/source/configy/Test.d
@@ -52,6 +52,7 @@
     }
 
     auto c1 = parseConfigString!Config("enabled: false", "/dev/null");
+    assert(!c1.enabled);
     assert(c1.name == "Jessie");
     assert(c1.age == 42);
     assert(c1.ratio == 24.42);