diff --git a/dw/imgrenderer.hh b/dw/imgrenderer.hh
index 14c574d..e9a6253 100644
--- a/dw/imgrenderer.hh
+++ b/dw/imgrenderer.hh
@@ -2,6 +2,7 @@
 #define __DW_IMGRENDERER_HH__
 
 #include <set>
+#include <algorithm>
 
 #ifndef __INCLUDED_FROM_DW_CORE_HH__
 #   error Do not include this file directly, use "core.hh" instead.
diff --git a/src/misc.cc b/src/misc.cc
index af636c1..d47f441 100644
--- a/src/misc.cc
+++ b/src/misc.cc
@@ -15,6 +15,8 @@
 #include <ctype.h>
 #include <assert.h>
 
+#include <algorithm>
+
 #include "utf8.hh"
 #include "msg.hh"
 #include "misc.hh"