diff --git a/CMakeLists.txt b/CMakeLists.txt
index fdcf7dd4..ef732d81 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,7 +74,10 @@ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 endif()
 
 # Debug flags
-set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -Wextra -Wundef")
+set(CMAKE_CXX_FLAGS_DEBUG "${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)