diff --git a/stim/visualization/cylinder.h b/stim/visualization/cylinder.h
index 145fac0..f70c679 100644
--- a/stim/visualization/cylinder.h
+++ b/stim/visualization/cylinder.h
@@ -58,7 +58,8 @@ public:
 
 	cylinder(stim::centerline<T> p, std::vector<T> s)
 	{
-		d = s;
+		//was d = s;
+		p = s;
 		init();
 	}
 	
--
libgit2 0.21.4