diff --git a/core/plug-in/uac_auth/CMakeLists.txt b/core/plug-in/uac_auth/CMakeLists.txt
index 9ee3035c..cde76368 100644
--- a/core/plug-in/uac_auth/CMakeLists.txt
+++ b/core/plug-in/uac_auth/CMakeLists.txt
@@ -1,5 +1,5 @@
 set (uac_auth_SRCS
-md5.c
+md5.cpp
 UACAuth.cpp
 )