diff --git a/CMakeLists.txt b/CMakeLists.txt
index 531c39c..3df385a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,7 +41,7 @@ IF (PAHO_HIGH_PERFORMANCE)
 ENDIF()
 
 IF(WIN32)
-  ADD_DEFINITIONS(-D_CRT_SECURE_NO_DEPRECATE -DWIN32_LEAN_AND_MEAN -MD)
+  ADD_DEFINITIONS(-D_CRT_SECURE_NO_DEPRECATE -DWIN32_LEAN_AND_MEAN)
 ELSEIF(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
   ADD_DEFINITIONS(-DOSX)
 ENDIF()