diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f5f6d3e..fad2f423 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,6 +89,11 @@ if (UNIX AND NOT APPLE)
            NOT _GLFW_HAS_GLXGETPROCADDRESSARB AND
            NOT _GLFW_HAS_GLXGETPROCADDRESSEXT)
 
+    find_library(LIBRT rt)
+    if (LIBRT)
+        list(APPEND GLFW_LIBRARIES ${LIBRT})
+    endif(LIBRT)
+
     if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
         set(_GLFW_USE_LINUX_JOYSTICKS 1)
     endif (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")