diff --git a/src/models/networks/model-net/dragonfly.c b/src/models/networks/model-net/dragonfly.c
index e7bd1becd5a16541490676e9f5a2482909d58104..45d49609cab3542866957116d2ce5f212e1f7c94 100644
--- a/src/models/networks/model-net/dragonfly.c
+++ b/src/models/networks/model-net/dragonfly.c
@@ -803,7 +803,7 @@ terminal_init( terminal_state * s,
         s->params = &all_params[num_params-1];
     }
     else{
-        s->anno = anno;
+        s->anno = strdup(anno);
         int id = configuration_get_annotation_index(anno, anno_map);
         s->params = &all_params[id];
     }
@@ -1517,7 +1517,7 @@ void router_setup(router_state * r, tw_lp * lp)
         r->params = &all_params[num_params-1];
     }
     else{
-        r->anno = anno;
+        r->anno = strdup(anno);
         int id = configuration_get_annotation_index(anno, anno_map);
         r->params = &all_params[id];
     }
diff --git a/src/models/networks/model-net/torus.c b/src/models/networks/model-net/torus.c
index e916c1f8f500fd88cfce8f22c1609837719a36c2..199a6cc6634b1523d724b7b9d3338406e6360925 100644
--- a/src/models/networks/model-net/torus.c
+++ b/src/models/networks/model-net/torus.c
@@ -359,7 +359,7 @@ static void torus_init( nodes_state * s,
         s->params = &all_params[num_params-1];
     }
     else{
-        s->anno = anno;
+        s->anno = strdup(anno);
         int id = configuration_get_annotation_index(anno, anno_map);
         s->params = &all_params[id];
     }