diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87ac053a..e8130082 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -75,11 +75,6 @@ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-switch-enum")
 endif()
 
-# Debug flags
-set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall")
-if(CMAKE_COMPILER_IS_GNUCXX)
-set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wextra -Wundef")
-endif(CMAKE_COMPILER_IS_GNUCXX)
 
 add_definitions(-D_CRT_SECURE_NO_WARNINGS)
 add_definitions(-std=c++11)