diff --git a/CMakeLists.txt b/CMakeLists.txt
index d472996f2..8c0f347f4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -849,7 +849,7 @@ endif()
 # Stratagus needs to have char by default signed
 # No idea how to tell this to other compilers
 if(CMAKE_COMPILER_IS_GNUCXX)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsigned-char")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsigned-char -std=gnu++0x")
 endif()
 if(CMAKE_COMPILER_IS_GNUC)
 	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsigned-char")