diff -ru libxcb-1.7~/src/xcb_conn.c libxcb-1.7/src/xcb_conn.c
--- libxcb-1.7~/src/xcb_conn.c	2010-08-13 07:43:31.000000000 -0400
+++ libxcb-1.7/src/xcb_conn.c	2011-06-06 13:43:13.000000000 -0400
@@ -325,14 +325,14 @@
     if(ret)
     {
 #if USE_POLL
-        if((fd.revents & POLLIN) == POLLIN)
+        if((fd.revents & POLLIN) != 0)
 #else
         if(FD_ISSET(c->fd, &rfds))
 #endif
             ret = ret && _xcb_in_read(c);
 
 #if USE_POLL
-        if((fd.revents & POLLOUT) == POLLOUT)
+        if((fd.revents & POLLOUT) != 0)
 #else
         if(FD_ISSET(c->fd, &wfds))
 #endif