diff --git a/centipede/environment.cc b/centipede/environment.cc
index 1a1289c6..b16db107 100644
--- a/centipede/environment.cc
+++ b/centipede/environment.cc
@@ -20,7 +20,6 @@
 #include <cmath>
 #include <cstddef>
 #include <cstdint>
-#include <filesystem>  // NOLINT
 #include <string>
 #include <system_error>  // NOLINT
 #include <vector>