diff --git a/packages/basic.gblib/services/SystemKeywords.ts b/packages/basic.gblib/services/SystemKeywords.ts
index 6477901d..c0a91e60 100644
--- a/packages/basic.gblib/services/SystemKeywords.ts
+++ b/packages/basic.gblib/services/SystemKeywords.ts
@@ -181,7 +181,7 @@ export class SystemKeywords {
     try {
       let output = [];
       let isObject = false;
-      if (data[0]= 'gb') {return data;} // Already GB Table.
+      if (data[0].gbarray) {return data;} // Already GB Table.
       if (Array.isArray(data)) {
         isObject = Object.keys(data[1]) !== null;
       } else {