diff --git a/web/app/sketcher/system.js b/web/app/sketcher/system.js
index 87fddb71..212b69fd 100644
--- a/web/app/sketcher/system.js
+++ b/web/app/sketcher/system.js
@@ -276,7 +276,7 @@ function visitParams(constraint, skipAux, callback) {
   if (constraint.visitParams) {
     constraint.visitParams(callback);
   } else {
-    constraint.getSolveData().forEach(([, sParams]) => sParams.forEach(callback));
+    constraint.getSolveData(FAKE_RESOLVER).forEach(([, sParams]) => sParams.forEach(callback));
   }
 }
 
@@ -288,4 +288,6 @@ const GOT_NOTHING = {
   has: () => false 
 };
 
+const FAKE_RESOLVER = () => 0;
+
 let COUNTER = 0;
\ No newline at end of file