diff --git a/license/CMakeLists.txt b/license/CMakeLists.txt
index bdaa693..05851d7 100644
--- a/license/CMakeLists.txt
+++ b/license/CMakeLists.txt
@@ -68,6 +68,7 @@ target_link_libraries(TeaLicenseServer
         pthread
         dl
         z
+		rt
 )
 
 #The test license client