diff --git a/libc/tools/generate_notice.py b/libc/tools/generate_notice.py
index e0e6b32..9b53f9f 100755
--- a/libc/tools/generate_notice.py
+++ b/libc/tools/generate_notice.py
@@ -38,6 +38,9 @@
         return False
     if path.name in {"notice", "readme", "pylintrc"}:
         return False
+    # Backup files for some editors.
+    if path.match("*~"):
+        return False
     return True