diff --git a/CMakeLists.txt b/CMakeLists.txt
index 62ab08a115..2b383c1dd5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,10 @@ cmake_minimum_required()
 
 project(QuantLib)
 
+if(APPLE AND NOT CMAKE_CXX_STANDARD)
+    set(CMAKE_CXX_STANDARD 11)
+endif()
+
 include(CTest)
 include(${CMAKE_CURRENT_LIST_DIR}/cmake/quantlib.cmake)