diff --git a/crypto/ex_data_impl.c b/crypto/ex_data_impl.c
index cac1daa..f55b369 100644
--- a/crypto/ex_data_impl.c
+++ b/crypto/ex_data_impl.c
@@ -167,6 +167,7 @@
  * structures. */
 static void class_free(EX_CLASS_ITEM *item) {
   sk_CRYPTO_EX_DATA_FUNCS_pop_free(item->meth, data_funcs_free);
+  OPENSSL_free(item);
 }
 
 static LHASH_OF(EX_CLASS_ITEM) *get_classes(void) {