diff --git a/lib/jasmine-core/jasmine.js b/lib/jasmine-core/jasmine.js
index 12543cdc..5260ddae 100644
--- a/lib/jasmine-core/jasmine.js
+++ b/lib/jasmine-core/jasmine.js
@@ -3525,7 +3525,7 @@ getJasmineRequireObj().ExceptionFormatter = function(j$) {
         lines.unshift(stackTrace.message);
       }
 
-      if (error.cause) {
+      if (error.cause && error.cause instanceof Error) {
         const substack = this.stack_(error.cause, {
           messageHandling: 'require'
         });