diff --git a/packages/dapp-svelte-wallet/ui/src/install-ses-lockdown.js b/packages/dapp-svelte-wallet/ui/src/install-ses-lockdown.js
index a21c423eb22..b677640600c 100644
--- a/packages/dapp-svelte-wallet/ui/src/install-ses-lockdown.js
+++ b/packages/dapp-svelte-wallet/ui/src/install-ses-lockdown.js
@@ -2,3 +2,7 @@ import 'ses/lockdown';
 import '@agoric/eventual-send/shim';
 
 lockdown({ errorTaming: 'unsafe' });
+
+// Even on non-v8, we tame the start compartment's Error constructor so
+// this assignment is not rejected, even if it does nothing.
+Error.stackTraceLimit = Infinity;
diff --git a/packages/install-ses/install-ses.js b/packages/install-ses/install-ses.js
index ace687f85e9..956bc1c223c 100644
--- a/packages/install-ses/install-ses.js
+++ b/packages/install-ses/install-ses.js
@@ -14,3 +14,7 @@ lockdown({ errorTaming: 'unsafe' });
 
 // 'Compartment' and 'harden' (and `StaticModuleRecord`) are now present in
 // our global scope.
+
+// Even on non-v8, we tame the start compartment's Error constructor so
+// this assignment is not rejected, even if it does nothing.
+Error.stackTraceLimit = Infinity;