1 files changed, 2 insertions, 0 deletions
diff --git a/src/mangen.h b/src/mangen.h
index e4a145b..b807e28 100644
--- a/src/mangen.h
+++ b/src/mangen.h
@@ -229,6 +229,8 @@ class ManGenerator : public OutputGenerator
     void endDotGraph(DotClassGraph &) {}
     void startInclDepGraph() {}
     void endInclDepGraph(DotInclDepGraph &) {}
+    void startGroupCollaboration() {}
+    void endGroupCollaboration(DotGroupCollaboration &) {}
     void startCallGraph() {}
     void endCallGraph(DotCallGraph &) {}
     void startDirDepGraph() {}