diff --git a/src/Disks/ObjectStorages/AzureBlobStorage/AzureBlobStorageCommon.cpp b/src/Disks/ObjectStorages/AzureBlobStorage/AzureBlobStorageCommon.cpp
index 942eb18e8ce..c1db590f1e8 100644
--- a/src/Disks/ObjectStorages/AzureBlobStorage/AzureBlobStorageCommon.cpp
+++ b/src/Disks/ObjectStorages/AzureBlobStorage/AzureBlobStorageCommon.cpp
@@ -108,7 +108,7 @@ ListBlobsPagedResponse ContainerClientWrapper::ListBlobs(const ListBlobsOptions
     new_options.Prefix = blob_prefix / options.Prefix.ValueOr("");
 
     auto response = client.ListBlobs(new_options);
-    auto blob_prefix_str = blob_prefix.string() + "/";
+    auto blob_prefix_str = blob_prefix.empty() ? "" : blob_prefix.string() + "/";
 
     for (auto & blob : response.Blobs)
     {