diff --git a/cachecontrol/caches/file_cache.py b/cachecontrol/caches/file_cache.py
index a4ddb5e4..523bb1a7 100644
--- a/cachecontrol/caches/file_cache.py
+++ b/cachecontrol/caches/file_cache.py
@@ -79,7 +79,7 @@ def __init__(
                 """
             NOTE: In order to use the FileCache you must have
             filelock installed. You can install it via pip:
-              pip install filelock
+              pip install cachecontrol[filecache]
             """
             )
             raise ImportError(notice)