diff --git a/doc/doxygen.conf b/doc/doxygen.conf
index 20e6641ef..dfd69278f 100644
--- a/doc/doxygen.conf
+++ b/doc/doxygen.conf
@@ -674,7 +674,7 @@ IMAGE_PATH             = doc
 # If FILTER_PATTERNS is specified, this tag will be
 # ignored.
 
-INPUT_FILTER           = kerneldoc2doxygen.pl
+INPUT_FILTER           = doc/kerneldoc2doxygen.pl
 
 # The FILTER_PATTERNS tag can be used to specify filters on a per file pattern
 # basis.