diff --git a/escodegen.js b/escodegen.js
index 54e7cfab..b7a15130 100644
--- a/escodegen.js
+++ b/escodegen.js
@@ -2312,6 +2312,11 @@
                 return 'null';
             }
 
+            // BigInt, eg: 1n
+            if (typeof expr.bigint === 'string') {
+                return expr.raw;
+            }
+
             if (typeof expr.value === 'string') {
                 return escapeString(expr.value);
             }