diff --git a/CMakeLists.txt b/CMakeLists.txt
index eada3dc31..a1d411060 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -177,7 +177,7 @@ if(UNIX)
   else(APPLE)
     set(NATS_OS "LINUX")
     set(NATS_USE_PTHREAD "-pthread")
-    set(NATS_EXTRA_LIB "rt")
+    set(NATS_EXTRA_LIB "rt -lpthread")
   endif(APPLE)
   if (${NATS_BUILD_ARCH} MATCHES "32")
     if(NOT APPLE)