diff --git a/src/dispnew.c b/src/dispnew.c
index 9ec88d9f45d..e5044267d3d 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -1879,7 +1879,7 @@ sit_for (sec, usec, reading, display)
     return Qt;
 
 #ifdef SIGIO
-  gobble_input ();
+  gobble_input (0);
 #endif
 
   XSET (read_kbd, Lisp_Int, reading ? -1 : 1);