diff --git a/src/lib/util/zippath.cpp b/src/lib/util/zippath.cpp
index 023484010b8..7e8e804ad42 100644
--- a/src/lib/util/zippath.cpp
+++ b/src/lib/util/zippath.cpp
@@ -48,7 +48,9 @@ int is_path_separator(char c)
 
 bool is_root(std::string_view path)
 {
-#if defined(OSD_WINDOWS)
+#if defined(WIN32)
+	// FIXME: don't assume paths are DOS-like - UNC paths, \\?\ long path prefix, etc. complicate this
+
 	// skip drive letter
 	if (path.length() >= 2 && isalpha(path[0]) && (path[1] == ':'))
 		path.remove_prefix(2);
@@ -56,6 +58,7 @@ bool is_root(std::string_view path)
 	// skip path separators
 	return path.find_first_not_of(PATH_SEPARATOR) == std::string_view::npos;
 #else
+	// FIXME: handle multiple successive path separators, current directory references, parent directory references
 	return (path.length() == 1) && (path[0] == '/');
 #endif
 }