diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7791b1b..83985bd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -488,6 +488,7 @@ add_definitions(-D__STDC_LIMIT_MACROS)
 add_definitions(-Wall -Wextra)
 add_definitions(-std=c++11)
 add_definitions(-DBOOST_MATH_DISABLE_FLOAT128=1)
+add_definitions(-fext-numeric-literals) 
 if(WIN32)
        add_definitions(-Wa,-mbig-obj -O3)
 endif()