diff --git a/libc/benchmarks/LibcBenchmark.h b/libc/benchmarks/LibcBenchmark.h
--- a/libc/benchmarks/LibcBenchmark.h
+++ b/libc/benchmarks/LibcBenchmark.h
@@ -38,6 +38,8 @@
 #include <chrono>
 #include <cmath>
 #include <cstdint>
+#include <iterator>
+#include <sys/types.h>
 
 namespace llvm {
 namespace libc_benchmarks {
@@ -272,8 +274,8 @@
   using difference_type = ssize_t;
   using size_type = size_t;
 
-  class const_iterator
-      : public std::iterator<std::input_iterator_tag, T, ssize_t> {
+  class const_iterator {
+    using iterator_category = std::input_iterator_tag;
     llvm::ArrayRef<T> Array;
     size_t Index;
     size_t Offset;