@@ -435,6 +435,8 @@ main(int argc, char *argv[])

 		return !error("Assembly", "Failed to assemble rom.");

 	if(!(dst = fopen(argv[2], "wb")))

 		return !error("Invalid Output", argv[2]);

+	if(p.length <= TRIM)

+		return !error("Assembly", "Output rom is empty.");

 	fwrite(p.data + TRIM, p.length - TRIM, 1, dst);

 	review(argv[2]);

 	return 0;