--- cegui-0.8.7/CMakeLists.txt~	2017-11-22 18:34:24.000000000 +0100
+++ cegui-0.8.7/CMakeLists.txt	2017-11-22 18:35:20.404123049 +0100
@@ -72,7 +72,7 @@
 
 if ((CMAKE_CXX_COMPILER_ID STREQUAL "GNU") OR (CMAKE_CXX_COMPILER_ID STREQUAL "Clang"))
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99")
-    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++03")
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fpermissive")
 elseif (NOT CMAKE_VERSION VERSION_LESS "3.1")
     set (CMAKE_C_STANDARD_REQUIRED TRUE)
     set (CMAKE_C_STANDARD "99")