diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index d5821c4c2..5f59145cf 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -221,7 +221,7 @@ ENABLE_PREPROCESSING   = YES
 MACRO_EXPANSION        = YES
 EXPAND_ONLY_PREDEF     = YES
 SEARCH_INCLUDES        = YES
-INCLUDE_PATH           = 
+INCLUDE_PATH           = @api_srcdir@
 INCLUDE_FILE_PATTERNS  = 
 PREDEFINED             = "LIST_OF(element_T)=element_T list" \
                          CONFIG_ECMASCRIPT \