diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9e7eab8..021008d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,8 +5,9 @@ project(libwebrtc)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
     ${CMAKE_SOURCE_DIR}/CMakeModules)
 
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MT")
-set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MTd")
+if (CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_CONFIGURATION_TYPES Debug Release)
+endif (CMAKE_CONFIGURATION_TYPES)
 
 find_package(Git REQUIRED)
 if (WIN32)