diff --git a/Utilities/cmlibuv/CMakeLists.txt b/Utilities/cmlibuv/CMakeLists.txt
index a8e25bae789affb2ccb7717248ca0591b8c82019..1899f8342eca7105b0cfb2c8a8258b7b768ace92 100644
--- a/Utilities/cmlibuv/CMakeLists.txt
+++ b/Utilities/cmlibuv/CMakeLists.txt
@@ -212,6 +212,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL "SunOS")
     nsl
     sendfile
     socket
+    rt
     )
   list(APPEND uv_headers
     include/uv-sunos.h