--- CMakeLists.txt.orig	2018-10-09 01:47:50 UTC
+++ CMakeLists.txt
@@ -8,7 +8,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SO
 
 # Default definitions
 if (NOT MSVC)
-  set(CMAKE_CXX_FLAGS "-Wall -Wextra -Wunused -Wshadow -Woverloaded-virtual -Wunreachable-code -Wconversion -Wno-sign-conversion -Wformat-security ${CMAKE_CXX_FLAGS}")
+  set(CMAKE_CXX_FLAGS "-Wall -Wextra -Wunused -Wshadow -Woverloaded-virtual -Wunreachable-code -Wconversion -Wformat-security ${CMAKE_CXX_FLAGS}")
   set(CMAKE_CXX_FLAGS "-fno-math-errno -fno-exceptions ${CMAKE_CXX_FLAGS}")
   set(CMAKE_CXX_FLAGS "-std=c++98 ${CMAKE_CXX_FLAGS}")
 else (NOT MSVC)