diff --git a/src/if_py_both.h b/src/if_py_both.h
index 8a2e32b..10c6148 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -405,7 +405,7 @@
 #endif
 
     static PyObject *
-VimEval(PyObject *self UNUSED, PyObject *args)
+VimEval(PyObject *self UNUSED, PyObject *args UNUSED)
 {
 #ifdef FEAT_EVAL
     char	*expr;