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-rw-r--r--atari/gemtk/guiwin.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/atari/gemtk/guiwin.c b/atari/gemtk/guiwin.c
index 18d873c7d..078fb3678 100644
--- a/atari/gemtk/guiwin.c
+++ b/atari/gemtk/guiwin.c
@@ -1219,7 +1219,7 @@ void gemtk_wm_send_msg(GUIWIN *win, short msg_type, short a, short b, short c,
msg[0] = msg_type;
msg[1] = gl_apid;
msg[2] = 0;
- msg[3] = win->handle;
+ msg[3] = (win != NULL) ? win->handle : NULL;
msg[4] = a;
msg[5] = b;
msg[6] = c;