diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7633676ef..9a4afb9e0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -207,11 +207,6 @@ endif ()
 if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
     find_package(PkgConfig REQUIRED)
 
-    if (CMAKE_VERSION VERSION_LESS "3.1")
-        # Workaround for an old CMake, which does not understand CMAKE_CXX_STANDARD.
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
-    endif()
-
     # Boost on Raspberry-Pi does not link to pthreads.
     set(THREADS_PREFER_PTHREAD_FLAG ON)
     find_package(Threads REQUIRED)