diff --git a/alib2algo_experimental/src/graph/isomorphism/HopcroftGraph.cpp b/alib2algo_experimental/src/graph/isomorphism/HopcroftGraph.cpp
index 4a8c29489ad4b97a07da607e47b36d59351b06d1..e934d287b297793157cf87a10b28947680cfb849 100644
--- a/alib2algo_experimental/src/graph/isomorphism/HopcroftGraph.cpp
+++ b/alib2algo_experimental/src/graph/isomorphism/HopcroftGraph.cpp
@@ -556,7 +556,7 @@ void Graph::dumpLabels()
 	std::cout << "Edges:" << std::endl;
 	for (Vertex *v : vertices) {
 		std::cout << v->dump() << ":";
-		v->forEachEdge([this](EdgeEnd *e) {
+		v->forEachEdge([](EdgeEnd *e) {
 			std::cout << " " << e->elabel << "-" << e->otheredge->elabel;
 			return true;
 		});