diff --git a/src/OpenSSL/crypto.py b/src/OpenSSL/crypto.py
index 4f7e4d8..4255358 100644
--- a/src/OpenSSL/crypto.py
+++ b/src/OpenSSL/crypto.py
@@ -2898,7 +2898,7 @@
         _raise_current_error()
 
     result = CRL.__new__(CRL)
-    result._crl = crl
+    result._crl = _ffi.gc(crl, _lib.X509_CRL_free)
     return result