diff --git a/include/ghc/filesystem.hpp b/include/ghc/filesystem.hpp
index 1f32160..72f8a5f 100644
--- a/include/ghc/filesystem.hpp
+++ b/include/ghc/filesystem.hpp
@@ -129,6 +129,7 @@
 #include <stack>
 #include <stdexcept>
 #include <string>
+#include <system_error>
 #include <type_traits>
 #include <utility>
 #include <vector>