diff --git a/core/lib/Drupal/Core/Url.php b/core/lib/Drupal/Core/Url.php
index c4779cf9a0..894b700f2b 100644
--- a/core/lib/Drupal/Core/Url.php
+++ b/core/lib/Drupal/Core/Url.php
@@ -290,7 +290,14 @@ public static function fromUri($uri, $options = []) {
       $uri_parts['scheme'] = '';
     }
     elseif (empty($uri_parts['scheme'])) {
-      throw new \InvalidArgumentException("The URI '$uri' is invalid. You must use a valid URI scheme.");
+      // Workaround for https://github.com/php/php-src/issues/9545.
+      if (!empty($uri_parts['path']) && str_ends_with($uri_parts['path'], ':')) {
+        $uri_parts['scheme'] = substr($uri_parts['path'], 0, -1);
+        unset($uri_parts['path']);
+      }
+      else {
+        throw new \InvalidArgumentException("The URI '$uri' is invalid. You must use a valid URI scheme.");
+      }
     }
     $uri_parts += ['path' => ''];
     // Discard empty fragment in $options for consistency with parse_url().