1 files changed, 1 insertions, 1 deletions
diff --git a/lib/ssluse.c b/lib/ssluse.c
index b2bb3bbe4..c0cf93664 100644
--- a/lib/ssluse.c
+++ b/lib/ssluse.c
@@ -1162,7 +1162,7 @@ Curl_ossl_connect(struct connectdata *conn,
 #ifdef SSL_CTRL_SET_MSG_CALLBACK
   if (data->set.fdebug) {
     if (!SSL_CTX_callback_ctrl(connssl->ctx, SSL_CTRL_SET_MSG_CALLBACK,
-                               ssl_tls_trace)) {
+                               (void (*)(void))ssl_tls_trace)) {
       failf(data, "SSL: couldn't set callback!");
       return CURLE_SSL_CONNECT_ERROR;
     }