diff --git a/src/archive.cc b/src/archive.cc
index 9170ca3ad6..4a6211e00e 100644
--- a/src/archive.cc
+++ b/src/archive.cc
@@ -1,3 +1,5 @@
+#include <cerrno>
+#include <algorithm>
 #include <vector>
 
 #include <sys/types.h>
diff --git a/src/pathlocks.cc b/src/pathlocks.cc
index 78aae26bdb..93f456ace6 100644
--- a/src/pathlocks.cc
+++ b/src/pathlocks.cc
@@ -1,3 +1,5 @@
+#include <cerrno>
+
 #include <fcntl.h>
 
 #include "pathlocks.hh"
diff --git a/src/references.cc b/src/references.cc
index 8934d53061..be432665b8 100644
--- a/src/references.cc
+++ b/src/references.cc
@@ -1,3 +1,4 @@
+#include <cerrno>
 #include <map>
 
 #include <sys/types.h>
diff --git a/src/util.cc b/src/util.cc
index f2cdb1d723..bedd031def 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -1,4 +1,6 @@
 #include <iostream>
+#include <cerrno>
+#include <cstdio>
 
 #include <sys/types.h>
 #include <sys/stat.h>