diff --git a/src/emu/video.c b/src/emu/video.c
index b81604c9847..49a7c02ea22 100644
--- a/src/emu/video.c
+++ b/src/emu/video.c
@@ -310,8 +310,9 @@ void video_manager::save_snapshot(screen_device *screen, emu_file &file)
 	png_add_text(&pnginfo, "System", text2);
 
 	// now do the actual work
-	const rgb_t *palette = (screen->palette() != NULL) ? screen->palette()->palette()->entry_list_adjusted() : NULL;
-	png_error error = png_write_bitmap(file, &pnginfo, m_snap_bitmap, screen->palette()->entries(), palette);
+	const rgb_t *palette = (screen !=NULL && screen->palette() != NULL) ? screen->palette()->palette()->entry_list_adjusted() : NULL;
+	int entries = (screen !=NULL && screen->palette() != NULL) ? screen->palette()->entries() : 0;
+	png_error error = png_write_bitmap(file, &pnginfo, m_snap_bitmap, entries, palette);
 	if (error != PNGERR_NONE)
 		mame_printf_error("Error generating PNG for snapshot: png_error = %d\n", error);