diff --git a/pre_commit_hooks/check_added_large_files.py b/pre_commit_hooks/check_added_large_files.py
index 91f5754..cb646d7 100644
--- a/pre_commit_hooks/check_added_large_files.py
+++ b/pre_commit_hooks/check_added_large_files.py
@@ -21,11 +21,20 @@
     return set(json.loads(lfs_ret)['files'])
 
 
-def find_large_added_files(filenames: Sequence[str], maxkb: int) -> int:
+def find_large_added_files(
+        filenames: Sequence[str],
+        maxkb: int,
+        *,
+        enforce_all: bool = False,
+) -> int:
     # Find all added files that are also in the list of files pre-commit tells
     # us about
     retv = 0
-    for filename in (added_files() & set(filenames)) - lfs_files():
+    filenames_filtered = set(filenames) - lfs_files()
+    if not enforce_all:
+        filenames_filtered &= added_files()
+
+    for filename in filenames_filtered:
         kb = int(math.ceil(os.stat(filename).st_size / 1024))
         if kb > maxkb:
             print(f'{filename} ({kb} KB) exceeds {maxkb} KB.')
@@ -41,12 +50,20 @@
         help='Filenames pre-commit believes are changed.',
     )
     parser.add_argument(
+        '--enforce-all', action='store_true',
+        help='Enforce all files are checked, not just staged files.',
+    )
+    parser.add_argument(
         '--maxkb', type=int, default=500,
         help='Maxmimum allowable KB for added files',
     )
-
     args = parser.parse_args(argv)
-    return find_large_added_files(args.filenames, args.maxkb)
+
+    return find_large_added_files(
+        args.filenames,
+        args.maxkb,
+        enforce_all=args.enforce_all,
+    )
 
 
 if __name__ == '__main__':