diff --git a/src/os_amiga.c b/src/os_amiga.c
index aff24c5..8627cb6 100644
--- a/src/os_amiga.c
+++ b/src/os_amiga.c
@@ -658,6 +658,12 @@
 }
 #endif
 
+    void
+mch_setmouse(int on UNUSED)
+{
+    // TODO: implement
+}
+
 /*
  * Insert user name in s[len].
  */