diff --git a/src/main.rs b/src/main.rs
index 9e1532d..55e9132 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -87,8 +87,8 @@ mod jni {
         pub extern "java" fn traceFromNative(
             env: &JNIEnv,
             text: String,
-        ) {
-            
+        ) -> JniResult<()> {
+
         }
 
         /*pub extern "java" fn threadTestNoClass(env: &JNIEnv, s: String) -> JniResult<i32> {}