diff --git a/CMakeLists.txt b/CMakeLists.txt
index b3c70f9c6c1..d07e3b692f8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -286,6 +286,11 @@ IF (CMAKE_BUILD_TYPE MATCHES Debug OR CMAKE_BUILD_TYPE MATCHES RelWithDebInfo)
   ADD_DEFINITIONS(-DQGISDEBUG=1)
 ENDIF (CMAKE_BUILD_TYPE MATCHES Debug OR CMAKE_BUILD_TYPE MATCHES RelWithDebInfo)
 
+IF(MSVC)
+  SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -DQGISDEBUG=1")
+  SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DQGISDEBUG=1")
+ENDIF(MSVC)
+
 #############################################################
 # platform specific stuff