diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index d22593407..58903a78e 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -31,5 +31,7 @@ MACRO_EXPANSION        = YES
 EXPAND_ONLY_PREDEF     = YES
 PREDEFINED             = PA_C_DECL_BEGIN= \
                          PA_C_DECL_END= \
-			 __USE_ISOC11
+			 __USE_ISOC11 \
+			 SPA_EXPORT \
+			 SPA_PRINTF_FUNC
 HTML_EXTRA_STYLESHEET  = @cssfiles@