Index: src/thinsrv/headless/headless.cpp
--- src/thinsrv/headless/headless.cpp.orig
+++ src/thinsrv/headless/headless.cpp
@@ -31,8 +31,8 @@ void printVersion()
 {
 	printf("drawpile-srv %s\n", cmake_config::version());
 	printf(
-		"Protocol version: %d.%d\n", cmake_config::proto::major(),
-		cmake_config::proto::minor());
+		"Protocol version: %d.%d\n", cmake_config::proto::_major(),
+		cmake_config::proto::_minor());
 	printf(
 		"Qt version: %s (compiled against %s)\n", qVersion(), QT_VERSION_STR);
 	printf(
