diff --git a/arbitrile.cpp b/arbitrile.cpp
index 29521ff3..f61bb17a 100644
--- a/arbitrile.cpp
+++ b/arbitrile.cpp
@@ -380,7 +380,7 @@ void connection_debugger() {
     string cap = its(k) + primes(last.second) + " -> " + its(get<0>(con)) + primes(get<1>(con)) + (get<2>(con) ? " (m) " : "");
     dialog::addSelItem(cap, "go", '0' + k);
     
-    dialog::add_action([k, last, &sh, con] {
+    dialog::add_action([k, last, con] {
       debug_polys.emplace_back(last.first * get_adj(debugged, last.second, k, -1), get<0>(con));
       });
     
@@ -689,4 +689,4 @@ EX void choose() {
   }
 
 EX }
-}
\ No newline at end of file
+}