diff --git a/src/builtins/ulimit.cpp b/src/builtins/ulimit.cpp
index 9f8224a6c..109600433 100644
--- a/src/builtins/ulimit.cpp
+++ b/src/builtins/ulimit.cpp
@@ -11,7 +11,6 @@
 #include "../builtin.h"
 #include "../common.h"
 #include "../fallback.h"  // IWYU pragma: keep
-#include "../io.h"
 #include "../wgetopt.h"
 #include "../wutil.h"  // IWYU pragma: keep