diff --git a/doc/Doxyfile b/doc/Doxyfile
index b0f9a097..e862979f 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -716,13 +716,13 @@ ENABLE_PREPROCESSING   = YES
 # compilation will be performed. Macro expansion can be done in a controlled 
 # way by setting EXPAND_ONLY_PREDEF to YES.
 
-MACRO_EXPANSION        = NO
+MACRO_EXPANSION        = YES
 
 # If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES 
 # then the macro expansion is limited to the macros specified with the 
 # PREDEFINED and EXPAND_AS_PREDEFINED tags.
 
-EXPAND_ONLY_PREDEF     = NO
+EXPAND_ONLY_PREDEF     = YES
 
 # If the SEARCH_INCLUDES tag is set to YES (the default) the includes files 
 # in the INCLUDE_PATH (see below) will be search if a #include is found.
@@ -748,14 +748,14 @@ INCLUDE_FILE_PATTERNS  =
 # or name=definition (no spaces). If the definition and the = are 
 # omitted =1 is assumed.
 
-PREDEFINED             = 
+PREDEFINED             = unix
 
 # If the MACRO_EXPANSION and EXPAND_PREDEF_ONLY tags are set to YES then 
 # this tag can be used to specify a list of macro names that should be expanded. 
 # The macro definition that is found in the sources will be used. 
 # Use the PREDEFINED tag if you want to use a different macro definition.
 
-EXPAND_AS_DEFINED      = 
+EXPAND_AS_DEFINED      = FLAC_API
 
 # If the SKIP_FUNCTION_MACROS tag is set to YES (the default) then 
 # doxygen's preprocessor will remove all function-like macros that are alone