diff --git a/docs/Doxyfile.in b/docs/Doxyfile.in
index 74b5134c..0c402bee 100644
--- a/docs/Doxyfile.in
+++ b/docs/Doxyfile.in
@@ -844,7 +844,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = @SRCDIR@
+INPUT                  = ../..
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses