diff --git a/packages/mesh-core-csl/src/core/serializer.ts b/packages/mesh-core-csl/src/core/serializer.ts
index 1b7edfd3..50633ecb 100644
--- a/packages/mesh-core-csl/src/core/serializer.ts
+++ b/packages/mesh-core-csl/src/core/serializer.ts
@@ -71,7 +71,7 @@ export class CSLSerializer implements IMeshTxSerializer {
     }
     const txBuildResult = csl.js_serialize_tx_body(txBodyJson, params);
     if (txBuildResult.get_status() !== "success") {
-      throw new Error(`txBuildResult error: ${txBuildResult.get_data()}`);
+      throw new Error(`txBuildResult error: ${txBuildResult.get_error()}`);
     }
     return txBuildResult.get_data();
   }