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-rw-r--r--src/xselect.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/xselect.c b/src/xselect.c
index c57f51604b3..66812bda044 100644
--- a/src/xselect.c
+++ b/src/xselect.c
@@ -63,8 +63,11 @@ Lisp_Object Vx_sent_selection_hooks;
*/
#define MAX_SELECTION_QUANTUM 0xFFFFFF
-#define SELECTION_QUANTUM(dpy) ((XMaxRequestSize (dpy) << 2) - 100)
-
+#ifdef HAVE_X11R4
+#define SELECTION_QUANTUM(dpy) ((XMaxRequestSize(dpy) << 2) - 100)
+#else
+#define SELECTION_QUANTUM(dpy) (((dpy)->max_request_size << 2) - 100)
+#endif
/* The timestamp of the last input event Emacs received from the X server. */
unsigned long last_event_timestamp;