diff --git a/cmake/bus/CMakeLists.txt b/cmake/bus/CMakeLists.txt
index 2ff6c9bc..a3528c7f 100644
--- a/cmake/bus/CMakeLists.txt
+++ b/cmake/bus/CMakeLists.txt
@@ -118,7 +118,7 @@ if (DBUS_ENABLE_EMBEDDED_TESTS)
 	set(SOURCES ${BUS_SOURCES} ${BUS_DIR}/test-main.c)
 	add_test_executable(test-bus "${SOURCES}"  ${DBUS_INTERNAL_LIBRARIES} ${XML_LIBRARY})
 	set_target_properties(test-bus PROPERTIES COMPILE_FLAGS ${DBUS_INTERNAL_CLIENT_DEFINITIONS})
-	if (NOT DBUS_WIN32)
+	if (NOT WIN32)
 		set(test_bus_system_SOURCES
 			${XML_SOURCES}
 			${BUS_DIR}/config-parser-common.c