diff --git a/src/SFML/System/CMakeLists.txt b/src/SFML/System/CMakeLists.txt
index 3083ab30..60f50b17 100644
--- a/src/SFML/System/CMakeLists.txt
+++ b/src/SFML/System/CMakeLists.txt
@@ -68,6 +68,9 @@ set(SYSTEM_EXT_LIBS)
 if(UNIX)
     set(SYSTEM_EXT_LIBS ${SYSTEM_EXT_LIBS} pthread)
 endif()
+if(LINUX)
+    set(SYSTEM_EXT_LIBS ${SYSTEM_EXT_LIBS} rt)
+endif()
 
 # define the sfml-system target
 sfml_add_library(sfml-system