diff --git a/wasm/kws/sherpa-onnx-kws.js b/wasm/kws/sherpa-onnx-kws.js
index 936f2c90..22679dc5 100644
--- a/wasm/kws/sherpa-onnx-kws.js
+++ b/wasm/kws/sherpa-onnx-kws.js
@@ -6,15 +6,15 @@ function freeConfig(config, Module) {
   }
 
   if ('transducer' in config) {
-    freeConfig(config.transducer);
+    freeConfig(config.transducer, Module);
   }
 
   if ('featConfig' in config) {
-    freeConfig(config.featConfig);
+    freeConfig(config.featConfig, Module);
   }
 
   if ('modelConfig' in config) {
-    freeConfig(config.modelConfig);
+    freeConfig(config.modelConfig, Module);
   }
 
   if ('keywordsBuffer' in config) {