diff --git a/lib/wraith/helpers/utilities.rb b/lib/wraith/helpers/utilities.rb
index 767e98ac..e98e1aa0 100644
--- a/lib/wraith/helpers/utilities.rb
+++ b/lib/wraith/helpers/utilities.rb
@@ -6,6 +6,9 @@ def convert_to_absolute(filepath)
   elsif filepath[0] == "/"
     # filepath is already absolute. return unchanged
     filepath
+  elsif filepath.match(/^[A-Z]:\/(.+)$/)
+    # filepath is an absolute Windows path, e.g. C:/Code/Wraith/javascript/global.js. return unchanged
+    filepath
   else
     # filepath is relative. it must be converted to absolute
     "#{Dir.pwd}/#{filepath}"
diff --git a/spec/helper_spec.rb b/spec/helper_spec.rb
new file mode 100644
index 00000000..20566862
--- /dev/null
+++ b/spec/helper_spec.rb
@@ -0,0 +1,31 @@
+require "_helpers"
+
+describe "Wraith helpers classes and functions" do
+
+  describe "the convert_to_absolute function" do
+    it "should return false if no filepath provided" do
+      expect(convert_to_absolute(nil)).to eq 'false'
+    end
+
+    it "should convert a relative path to absolute" do
+      relative = 'my/filepath'
+      absolute = convert_to_absolute relative
+      expect(absolute[0]).to eq '/'
+      expect(absolute.length).to be > relative.length
+      expect(absolute).to match(/\/(.+)\/(.+)\/my\/filepath/)
+    end
+
+    it "should leave an absolute path unchanged" do
+      relative = '/my/filepath'
+      absolute = convert_to_absolute relative
+      expect(absolute).to eq relative
+    end
+
+    it "should leave a Windows-flavoured absolute path unchanged" do
+      relative = 'C:/Code/Wraith/javascript/global.js'
+      absolute = convert_to_absolute relative
+      expect(absolute).to eq relative
+    end
+  end
+
+end