diff --git a/lib/facter/root_home.rb b/lib/facter/root_home.rb
index 61fcf39..8249f7d 100644
--- a/lib/facter/root_home.rb
+++ b/lib/facter/root_home.rb
@@ -7,7 +7,9 @@ module Facter::Util::RootHome
   def get_root_home
     root_ent = Facter::Util::Resolution.exec("getent passwd root")
     # The home directory is the sixth element in the passwd entry
-    root_ent.split(":")[5]
+    # If the platform doesn't have getent, root_ent will be nil and we should
+    # return it straight away.
+    root_ent && root_ent.split(":")[5]
   end
   end
 end
diff --git a/spec/unit/facter/root_home_spec.rb b/spec/unit/facter/root_home_spec.rb
index 8946d9d..ce80684 100644
--- a/spec/unit/facter/root_home_spec.rb
+++ b/spec/unit/facter/root_home_spec.rb
@@ -30,13 +30,11 @@ describe Facter::Util::RootHome do
     end
   end
   context "windows" do
-    let(:root_ent) { "FIXME TBD on Windows" }
-    let(:expected_root_home) { "FIXME TBD on Windows" }
-
-    it "should return FIXME TBD on windows" do
-      pending "FIXME: TBD on windows"
-      Facter::Util::Resolution.expects(:exec).with("getent passwd root").returns(root_ent)
-      Facter::Util::RootHome.get_root_home.should == expected_root_home
+    before :each do
+      Facter::Util::Resolution.expects(:exec).with("getent passwd root").returns(nil)
+    end
+    it "should be nil on windows" do
+      Facter::Util::RootHome.get_root_home.should be_nil
     end
   end
 end