diff --git a/src/Local/FallbackMimeTypeDetector.php b/src/Local/FallbackMimeTypeDetector.php
index 5344b1632..be338422e 100644
--- a/src/Local/FallbackMimeTypeDetector.php
+++ b/src/Local/FallbackMimeTypeDetector.php
@@ -47,6 +47,6 @@ public function detectMimeTypeFromFile(string $path): ?string
             return $mimeType;
         }
 
-        return $this->detector->detectMimeTypeFromPath($path);
+        return $this->detector->detectMimeTypeFromPath($path) ?? $mimeType;
     }
 }