diff --git a/src/Orchard.Web/Modules/Orchard.Azure/Services/FileSystems/Media/AzureBlobStorageProvider.cs b/src/Orchard.Web/Modules/Orchard.Azure/Services/FileSystems/Media/AzureBlobStorageProvider.cs
index b4e28edc3..483e77259 100644
--- a/src/Orchard.Web/Modules/Orchard.Azure/Services/FileSystems/Media/AzureBlobStorageProvider.cs
+++ b/src/Orchard.Web/Modules/Orchard.Azure/Services/FileSystems/Media/AzureBlobStorageProvider.cs
@@ -67,7 +67,7 @@ namespace Orchard.Azure.Services.FileSystems.Media {
             EnsureInitialized();
             var rootUri = new Uri(_absoluteRoot);
             var uri = new Uri(url);
-            if((uri.Host == rootUri.Host || (!string.IsNullOrWhiteSpace(_publicHostName) && uri.Host == _publicHostName)) && uri.AbsolutePath.StartsWith(rootUri.AbsolutePath)) {
+            if((uri.Host == rootUri.Host || (!string.IsNullOrEmpty(_publicHostName) && uri.Host == _publicHostName)) && uri.AbsolutePath.StartsWith(rootUri.AbsolutePath)) {
                 return HttpUtility.UrlDecode(uri.PathAndQuery.Substring(Combine(rootUri.AbsolutePath, "/").Length));
             }