diff --git a/src/keyboard.c b/src/keyboard.c
index de9805df327..5a43e9a46aa 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -7180,7 +7180,6 @@ tty_read_avail_input (struct terminal *terminal,
 static void
 handle_async_input (void)
 {
-#ifdef USABLE_SIGIO
   while (1)
     {
       int nread = gobble_input ();
@@ -7190,7 +7189,6 @@ handle_async_input (void)
       if (nread <= 0)
 	break;
     }
-#endif
 }
 
 void