diff --git a/src/ui.c b/src/ui.c
index 89b5cd6..3fe99c5 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -1680,6 +1680,7 @@
     return (int)maxlen;
 }
 
+/*ARGSUSED*/
     void
 fill_input_buf(exit_on_error)
     int	exit_on_error;