diff --git a/simgear/io/HTTPRepository.cxx b/simgear/io/HTTPRepository.cxx
index 2d53a9b3..5c7186da 100644
--- a/simgear/io/HTTPRepository.cxx
+++ b/simgear/io/HTTPRepository.cxx
@@ -23,7 +23,6 @@
 #include <algorithm>
 #include <cassert>
 #include <cstdlib>
-#include <filesystem>
 #include <fstream>
 #include <iostream>
 #include <limits>