diff --git a/mold.h b/mold.h
index 48b4aacf..bce75e08 100644
--- a/mold.h
+++ b/mold.h
@@ -24,11 +24,6 @@
 #include <cstdint>
 #include <mutex>
 #include <string>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <unistd.h>
-#include <unordered_set>
 
 #define SECTOR_SIZE 512
 #define PAGE_SIZE 4096
diff --git a/output_chunks.cc b/output_chunks.cc
index aafa5118..644dfd14 100644
--- a/output_chunks.cc
+++ b/output_chunks.cc
@@ -1,5 +1,7 @@
 #include "mold.h"
 
+#include <shared_mutex>
+
 using namespace llvm::ELF;
 
 OutputEhdr *out::ehdr;