diff --git a/src/NzbDrone.Common.Test/Http/HttpUriFixture.cs b/src/NzbDrone.Common.Test/Http/HttpUriFixture.cs
new file mode 100644
index 000000000..09cda2be7
--- /dev/null
+++ b/src/NzbDrone.Common.Test/Http/HttpUriFixture.cs
@@ -0,0 +1,29 @@
+using FluentAssertions;
+using NUnit.Framework;
+using NzbDrone.Common.Http;
+using NzbDrone.Test.Common;
+
+namespace NzbDrone.Common.Test.Http
+{
+    public class HttpUriFixture : TestBase
+    {
+        private HttpUri GivenHttpUri(string basePath)
+        {
+            return new HttpUri("http", "localhost", 8989, basePath, null, null);
+        }
+
+        [TestCase("", "", "")]
+        [TestCase("base", "", "/base")]
+        [TestCase("/base", "", "/base")]
+        [TestCase("", "relative", "/relative")]
+        [TestCase("", "/relative", "/relative")]
+        [TestCase("base", "relative", "/base/relative")]
+        [TestCase("base", "/relative", "/base/relative")]
+        [TestCase("/base", "relative", "/base/relative")]
+        [TestCase("/base", "/relative", "/base/relative")]
+        public void should_combine_base_path_and_relative_path(string basePath, string relativePath, string expected)
+        {
+            GivenHttpUri(basePath).CombinePath(relativePath).Path.Should().Be(expected);
+        }
+    }
+}
diff --git a/src/NzbDrone.Common.Test/NzbDrone.Common.Test.csproj b/src/NzbDrone.Common.Test/NzbDrone.Common.Test.csproj
index 338a9e926..84892c6b1 100644
--- a/src/NzbDrone.Common.Test/NzbDrone.Common.Test.csproj
+++ b/src/NzbDrone.Common.Test/NzbDrone.Common.Test.csproj
@@ -83,6 +83,7 @@
     <Compile Include="Http\HttpClientFixture.cs" />
     <Compile Include="Http\HttpRequestBuilderFixture.cs" />
     <Compile Include="Http\HttpRequestFixture.cs" />
+    <Compile Include="Http\HttpUriFixture.cs" />
     <Compile Include="InstrumentationTests\CleanseLogMessageFixture.cs" />
     <Compile Include="LevenshteinDistanceFixture.cs" />
     <Compile Include="OsPathFixture.cs" />
diff --git a/src/NzbDrone.Common/Http/HttpUri.cs b/src/NzbDrone.Common/Http/HttpUri.cs
index c8c83de66..05d12e7d8 100644
--- a/src/NzbDrone.Common/Http/HttpUri.cs
+++ b/src/NzbDrone.Common/Http/HttpUri.cs
@@ -144,23 +144,12 @@ namespace NzbDrone.Common.Http
                 return basePath;
             }
 
-            var newPath = "/" + relativePath.TrimStart('/');
-
-            if (basePath != null && !relativePath.StartsWith("/"))
+            if (basePath.IsNullOrWhiteSpace())
             {
-                var baseSlashIndex = basePath.LastIndexOf('/');
-
-                if (baseSlashIndex == basePath.Length - 1)
-                {
-                    newPath = basePath.TrimEnd('/') + newPath;
-                }
-                else if (baseSlashIndex != 0)
-                {
-                    newPath = basePath.Substring(0, baseSlashIndex) + newPath;
-                }
+                return "/" + relativePath.TrimStart('/');
             }
 
-            return newPath;
+            return basePath.TrimEnd("/") + "/" + relativePath.TrimStart('/');
         }
 
         public HttpUri SetQuery(string query)
@@ -199,7 +188,6 @@ namespace NzbDrone.Common.Http
             return SetQuery(builder.ToString());
         }
 
-
         public override int GetHashCode()
         {
             return _uri.GetHashCode();