diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index b044015977..97d2e46248 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -1414,9 +1414,9 @@ DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)
 #define SSL_set_max_proto_version(s, version) \
         SSL_ctrl(s, SSL_CTRL_SET_MAX_PROTO_VERSION, version, NULL)
 #define SSL_get_min_proto_version(s) \
-        SSL_ctrl(s, SSL_CTRL_GET_MIN_PROTO_VERSION, NULL, NULL)
+        SSL_ctrl(s, SSL_CTRL_GET_MIN_PROTO_VERSION, 0, NULL)
 #define SSL_get_max_proto_version(s) \
-        SSL_ctrl(s, SSL_CTRL_GET_MAX_PROTO_VERSION, NULL, NULL)
+        SSL_ctrl(s, SSL_CTRL_GET_MAX_PROTO_VERSION, 0, NULL)
 
 #if OPENSSL_API_COMPAT < 0x10100000L
 /* Provide some compatibility macros for removed functionality. */