diff --git a/sherpa-onnx/jni/offline-speech-denoiser.cc b/sherpa-onnx/jni/offline-speech-denoiser.cc
index d1377c8d..1cac9684 100644
--- a/sherpa-onnx/jni/offline-speech-denoiser.cc
+++ b/sherpa-onnx/jni/offline-speech-denoiser.cc
@@ -90,7 +90,7 @@ Java_com_k2fsa_sherpa_onnx_OfflineSpeechDenoiser_newFromFile(JNIEnv *env,
         auto speech_denoiser = new sherpa_onnx::OfflineSpeechDenoiser(config);
         return reinterpret_cast<jlong>(speech_denoiser);
       },
-      0L);
+      (jlong)0);
 }
 
 SHERPA_ONNX_EXTERN_C
diff --git a/sherpa-onnx/jni/offline-tts.cc b/sherpa-onnx/jni/offline-tts.cc
index bb609cab..4a11d064 100644
--- a/sherpa-onnx/jni/offline-tts.cc
+++ b/sherpa-onnx/jni/offline-tts.cc
@@ -234,7 +234,7 @@ JNIEXPORT jlong JNICALL Java_com_k2fsa_sherpa_onnx_OfflineTts_newFromFile(
         auto tts = new sherpa_onnx::OfflineTts(config);
         return reinterpret_cast<jlong>(tts);
       },
-      0L);
+      (jlong)0);
 }
 
 SHERPA_ONNX_EXTERN_C