diff --git a/WINGs/wevent.c b/WINGs/wevent.c
index a112bcd5..9656ddaa 100644
--- a/WINGs/wevent.c
+++ b/WINGs/wevent.c
@@ -797,15 +797,15 @@ W_WaitForEvent(Display *dpy, unsigned long xeventmask)
 	    mask = 0;
 
             if ((handler->mask & WIReadMask) &&
-                fds[k].revents & (POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI))
+                (fds[k].revents & (POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI)))
                 mask |= WIReadMask;
 
             if ((handler->mask & WIWriteMask) &&
-                fds[k].revents & (POLLOUT | POLLWRBAND))
+                (fds[k].revents & (POLLOUT | POLLWRBAND)))
                 mask |= WIWriteMask;
 
             if ((handler->mask & WIExceptMask) &&
-                fds[k].revents & (POLLHUP | POLLNVAL | POLLERR))
+                (fds[k].revents & (POLLHUP | POLLNVAL | POLLERR)))
                 mask |= WIExceptMask;
 
             next = handler->next;
diff --git a/WINGs/wutil.c b/WINGs/wutil.c
index d939c04b..92cb1a7e 100644
--- a/WINGs/wutil.c
+++ b/WINGs/wutil.c
@@ -443,15 +443,15 @@ handleInputEvents(Bool waitForInput)
 	    mask = 0;
 
             if ((handler->mask & WIReadMask) &&
-                fds[k].revents & (POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI))
+                (fds[k].revents & (POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI)))
                 mask |= WIReadMask;
 
             if ((handler->mask & WIWriteMask) &&
-                fds[k].revents & (POLLOUT | POLLWRBAND))
+                (fds[k].revents & (POLLOUT | POLLWRBAND)))
                 mask |= WIWriteMask;
 
             if ((handler->mask & WIExceptMask) &&
-                fds[k].revents & (POLLHUP | POLLNVAL | POLLERR))
+                (fds[k].revents & (POLLHUP | POLLNVAL | POLLERR)))
                 mask |= WIExceptMask;
 
             next = handler->next;