1 files changed, 1 insertions, 1 deletions

diff --git a/src/window.c b/src/window.c
index 133229af5f6..89d9305ca33 100644
--- a/src/window.c
+++ b/src/window.c
@@ -1274,7 +1274,7 @@ window_loop (type, obj, mini, frames)
                 /* If this window is dedicated, and in a frame of its own,
                    kill the frame.  */
                 if (EQ (w, FRAME_ROOT_WINDOW (f))
-                    && XWINDOW (w)->dedicated
+                    && !NILP (XWINDOW (w)->dedicated)
                     && other_visible_frames (f))
                   Fdelete_frame (WINDOW_FRAME (XWINDOW (w)), Qnil);
                 else