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-rw-r--r--apps/xwininfo/dsimple.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/apps/xwininfo/dsimple.c b/apps/xwininfo/dsimple.c
index 6432e1335..ca746e99a 100644
--- a/apps/xwininfo/dsimple.c
+++ b/apps/xwininfo/dsimple.c
@@ -205,6 +205,8 @@ xcb_window_t Select_Window(xcb_connection_t *dpy,
xcb_allow_events (dpy, XCB_ALLOW_SYNC_POINTER, XCB_TIME_CURRENT_TIME);
xcb_flush (dpy);
event = xcb_wait_for_event (dpy);
+ if (event == NULL)
+ Fatal_Error ("Fatal IO error");
switch (event->response_type & 0x7f) {
case XCB_BUTTON_PRESS:
{