diff --git a/src/_cffi_src/openssl/crypto.py b/src/_cffi_src/openssl/crypto.py
index 9357815..b9ecd5a 100644
--- a/src/_cffi_src/openssl/crypto.py
+++ b/src/_cffi_src/openssl/crypto.py
@@ -43,7 +43,6 @@
 void (*CRYPTO_get_locking_callback(void))(int, int, const char *, int);
 void CRYPTO_lock(int, int, const char *, int);
 
-void OPENSSL_free(void *);
 """
 
 MACROS = """
@@ -55,6 +54,9 @@
 const char *OpenSSL_version(int);
 
 void CRYPTO_add(int *, int, int);
+
+/* this is a macro in 1.1.0 */
+void OPENSSL_free(void *);
 """
 
 CUSTOMIZATIONS = """