diff --git a/scripts/update_api.py b/scripts/update_api.py
index 161c783e8..557ac4c6c 100755
--- a/scripts/update_api.py
+++ b/scripts/update_api.py
@@ -1704,7 +1704,6 @@ def write_exe_c_preamble(exe_c):
 def write_core_py_post(core_py):
   core_py.write("""
 # Clean up
-del _lib
 del _default_dirs
 del _all_dirs
 del _ext