Fix warnings

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Collapse/example/edge_collapse_conserve_persistence.cpp b/src/Collapse/example/edge_collapse_conserve_persistence.cpp
index 93982081..9c561efc 100644
--- a/src/Collapse/example/edge_collapse_conserve_persistence.cpp
+++ b/src/Collapse/example/edge_collapse_conserve_persistence.cpp
@@ -115,7 +115,7 @@ int main(int argc, char* argv[]) {
   Flag_complex_sparse_matrix mat_filt_edge_coll(proximity_graph);
 
   Simplex_tree stree_from_collapse;
-  for (Vertex_handle vertex = 0; vertex < point_vector.size(); vertex++) {
+  for (Vertex_handle vertex = 0; static_cast<std::size_t>(vertex) < point_vector.size(); vertex++) {
         // insert the vertex with a 0. filtration value just like a Rips
         stree_from_collapse.insert_simplex({vertex}, 0.);
   }