diff --git a/scripts/cmake/vcpkg_download_distfile.cmake b/scripts/cmake/vcpkg_download_distfile.cmake
index 8f250c67e1..11bbac3b46 100644
--- a/scripts/cmake/vcpkg_download_distfile.cmake
+++ b/scripts/cmake/vcpkg_download_distfile.cmake
@@ -186,6 +186,10 @@ function(vcpkg_download_distfile VAR)
                 "    Failed to download file.\n"
                 "    If you use a proxy, please set the HTTPS_PROXY and HTTP_PROXY environment\n"
                 "    variables to \"https://user:password@your-proxy-ip-address:port/\".\n"
+                "    \n"
+                "    If error with status 4 (Issue #15434),\n"
+                "    try setting \"http://user:password@your-proxy-ip-address:port/\".\n"
+                "    \n"
                 "    Otherwise, please submit an issue at https://github.com/Microsoft/vcpkg/issues\n")
             else()
                 test_hash("${download_file_path_part}" "downloaded file" "The file may have been corrupted in transit. This can be caused by proxies. If you use a proxy, please set the HTTPS_PROXY and HTTP_PROXY environment variables to \"https://user:password@your-proxy-ip-address:port/\".\n")