diff --git a/modules/proxy/proxy_util.c b/modules/proxy/proxy_util.c
index d1c86f93fd..1a3f1928f2 100644
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -2831,7 +2831,7 @@ PROXY_DECLARE(int) ap_proxy_is_socket_connected(apr_socket_t *socket)
 
 }
 #else
-PROXY_DECLARE(int) ap_proxy_is_socket_connected(apr_socket_t *socket)
+PROXY_DECLARE(int) ap_proxy_is_socket_connected(apr_socket_t *sock)
 
 {
     apr_size_t buffer_len = 1;