diff --git a/docs/Doxygen/doxyfile b/docs/Doxygen/doxyfile
index c6438692..b7872e25 100644
--- a/docs/Doxygen/doxyfile
+++ b/docs/Doxygen/doxyfile
@@ -164,12 +164,18 @@ PERLMOD_MAKEVAR_PREFIX =
 # Configuration options related to the preprocessor   
 #---------------------------------------------------------------------------
 ENABLE_PREPROCESSING   = YES
-MACRO_EXPANSION        = NO
-EXPAND_ONLY_PREDEF     = NO
+MACRO_EXPANSION        = YES
+EXPAND_ONLY_PREDEF     = YES
 SEARCH_INCLUDES        = YES
 INCLUDE_PATH           = 
 INCLUDE_FILE_PATTERNS  = 
-PREDEFINED             = 
+PREDEFINED             = VERTEX_TYPE=VertexFull \
+                         __VCGLIB_VERTEX_N \
+                         __VCGLIB_VERTEX_Q \
+                         __VCGLIB_VERTEX_C \
+                         __VCGLIB_VERTEX_M \
+                         __VCGLIB_VERTEX_A \
+                         __VCGLIB_VERTEX_T
 EXPAND_AS_DEFINED      = 
 SKIP_FUNCTION_MACROS   = YES
 #---------------------------------------------------------------------------