diff --git a/src/cycling.c b/src/cycling.c
index 4c7612f..4fab84c 100644
--- a/src/cycling.c
+++ b/src/cycling.c
@@ -40,6 +40,9 @@ static void raiseWindow(WSwitchPanel * swpanel, WWindow * wwin)
 {
 	WNativeWindow swwin = wSwitchPanelGetWindow(swpanel);
 
+	if (!wwin->frame)
+		return; /* Phase 75: Wayland — no frame window to raise */
+
 	if (wwin->flags.mapped || wwin->flags.shaded) {
 		if (swwin != WNATIVE_NONE) {
 			WNativeWindow win[2];
@@ -60,7 +63,7 @@ static WWindow *change_focus_and_raise(WWindow *newFocused, WWindow *oldFocused,
 		return oldFocused;
 
 	/* allow the focused window to float on top of a fullscreen window */
-	if (oldFocused->flags.fullscreen)
+	if (oldFocused->flags.fullscreen && oldFocused->frame)
 		ChangeStackingLevel(oldFocused->frame->core, WMNormalLevel);
 
 	wWindowFocus(newFocused, oldFocused);
diff --git a/tests/wl-smoke-test.sh b/tests/wl-smoke-test.sh
index 73e6fd3..18320df 100755
--- a/tests/wl-smoke-test.sh
+++ b/tests/wl-smoke-test.sh
@@ -85,6 +85,9 @@
 #      client_synth_configure for Wayland windows; wWindowSingleFocus and
 #      wWindowSaveState use client geometry fallback when frame is NULL
 #      (build-only check).
+#  33. (Phase 75) Frame NULL guards in cycling.c: raiseWindow skips stacking
+#      for Wayland windows; change_focus_and_raise skips fullscreen stacking
+#      restore when frame is NULL (build-only check).
 #
 # This test grows as wl_backend vtable slots are implemented.
 #