diff --git a/contrib/asterisk-ng-doxygen b/contrib/asterisk-ng-doxygen
index 42b8a99e91..cffa12a1e2 100644
--- a/contrib/asterisk-ng-doxygen
+++ b/contrib/asterisk-ng-doxygen
@@ -469,6 +469,7 @@ INPUT                  = ./ \
                          bridges \
                          cdr \
                          channels \
+                         channels/sip \
                          channels/misdn \
                          codecs \
                          formats \