diff --git a/lib/src/main/kotlin/tribufu/TribuFu.kt b/lib/src/main/kotlin/tribufu/TribuFu.kt
index 298372b..1772f25 100644
--- a/lib/src/main/kotlin/tribufu/TribuFu.kt
+++ b/lib/src/main/kotlin/tribufu/TribuFu.kt
@@ -6,7 +6,7 @@ class TribuFu {
     /**
      * A native method that is implemented by the 'TribuFu' native library.
      */
-    // external fun Hello(): Int
+    external fun Hello(input: String): String
 
     // Used to load the 'TribuFu' library on application startup.
     fun LoadLibrary() {