diff --git a/CMakeLists.txt b/CMakeLists.txt
index d788b60..7fb7b1e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,9 +84,9 @@
   set(BUILD_WINVNC 1)
 endif()
 
-# Minimum version is Windows XP SP2 (5.2)
+# Minimum version is Windows Vista/2008 (6.0)
 if(WIN32)
-  add_definitions(-D_WIN32_IE=0x0502 -D_WIN32_WINNT=0x0502)
+  add_definitions(-D_WIN32_WINNT=0x0600)
 endif()
 
 if(CMAKE_SIZEOF_VOID_P MATCHES 8)