diff --git a/Doxyfile b/Doxyfile
index 3b19893..64c6696 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -1423,7 +1423,7 @@ INCLUDE_FILE_PATTERNS  =
 # undefined via #undef or recursively expanded use the := operator 
 # instead of the = operator.
 
-PREDEFINED             = 
+PREDEFINED             = WIN32
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then 
 # this tag can be used to specify a list of macro names that should be expanded.