diff --git a/HalfedgeDS/examples/HalfedgeDS/hds_prog_compact2.cpp b/HalfedgeDS/examples/HalfedgeDS/hds_prog_compact2.cpp
index 2d4f3f6893d..0f628ab69fa 100644
--- a/HalfedgeDS/examples/HalfedgeDS/hds_prog_compact2.cpp
+++ b/HalfedgeDS/examples/HalfedgeDS/hds_prog_compact2.cpp
@@ -55,7 +55,7 @@ public:
                                                  (~ std::ptrdiff_t(1))));
     }
     void  set_opposite( Halfedge_handle h) {
-        asseert(( &* h - 1 == &* HDS::halfedge_handle(this)) ||
+        assert(( &* h - 1 == &* HDS::halfedge_handle(this)) ||
                 ( &* h + 1 == &* HDS::halfedge_handle(this)));
         if ( &* h - 1 == &* HDS::halfedge_handle(this))
             nxt |= 1;