diff --git a/packages/pg/lib/result.js b/packages/pg/lib/result.js
index ba22ea18..2ac6a0d4 100644
--- a/packages/pg/lib/result.js
+++ b/packages/pg/lib/result.js
@@ -98,7 +98,7 @@ class Result {
         this._parsers[i] = types.getTypeParser(desc.dataTypeID, desc.format || 'text')
       }
     }
-    this._prebuiltEmptyResultObject = row
+    this._prebuiltEmptyResultObject = { ...row }
   }
 }