diff --git a/rogueviz/sag/sag.cpp b/rogueviz/sag/sag.cpp
index 243501d4..78826539 100644
--- a/rogueviz/sag/sag.cpp
+++ b/rogueviz/sag/sag.cpp
@@ -363,6 +363,7 @@ void clear() {
   sagdist.clear();
   state = 0;
   qon.clear(); qsf.clear();
+  sag_edge = nullptr;
   }
 
 string cname() {