diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6799d7dcd..dcf93e03c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -207,7 +207,9 @@ if (WIN32)
     if (MINGW)
         add_definitions (-D__MINGW32__)
     endif (MINGW)
-
+	if (CMAKE_SIZEOF_VOID_P EQUAL 4)
+        add_definitions (-DWINVER=0x0501)
+    endif (CMAKE_SIZEOF_VOID_P EQUAL 4)
     set (EXTRA_LIB "-lws2_32 -lshlwapi")
 endif (WIN32)
 # you may need lcms v1.xx for older version : pkg_check_modules (LCMS REQUIRED lcms<=1.99)