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-rw-r--r--libxcb/src/xcb_conn.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/libxcb/src/xcb_conn.c b/libxcb/src/xcb_conn.c
index ed2153d27..1d3761452 100644
--- a/libxcb/src/xcb_conn.c
+++ b/libxcb/src/xcb_conn.c
@@ -210,6 +210,14 @@ xcb_connection_t *xcb_connect_to_fd(int fd, xcb_auth_info_t *auth_info)
{
xcb_connection_t* c;
+#ifndef USE_POLL
+ if(fd >= FD_SETSIZE) /* would overflow in FD_SET */
+ {
+ close(fd);
+ return (xcb_connection_t *) &error_connection;
+ }
+#endif
+
c = calloc(1, sizeof(xcb_connection_t));
if(!c) {
close(fd);