diff --git a/vcg/complex/complex.h b/vcg/complex/complex.h
index f60d341a..138db127 100644
--- a/vcg/complex/complex.h
+++ b/vcg/complex/complex.h
@@ -36,6 +36,7 @@
 #include <stdexcept>
 #include <limits>
 #include <set>
+#include <wrap/callback.h>
 #include <vcg/complex/exception.h>
 #include <vcg/container/simple_temporary_data.h>
 #include <vcg/complex/used_types.h>