diff --git a/packages/basic.gblib/services/SystemKeywords.ts b/packages/basic.gblib/services/SystemKeywords.ts
index 78d806af..ef0cd6f0 100644
--- a/packages/basic.gblib/services/SystemKeywords.ts
+++ b/packages/basic.gblib/services/SystemKeywords.ts
@@ -2259,6 +2259,7 @@ export class SystemKeywords {
           }
 
           row[propertyName] = value;
+          value = null;
         }
         row['line'] = foundIndex + 1;
         table.push(row);