diff --git a/src/compiler/util.cpp b/src/compiler/util.cpp
index 66f25269e..860145dcd 100644
--- a/src/compiler/util.cpp
+++ b/src/compiler/util.cpp
@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 
 Author: Leonardo de Moura
 */
+#include <algorithm>
 #include "kernel/find_fn.h"
 #include "kernel/inductive/inductive.h"
 #include "library/util.h"
diff --git a/src/library/aux_recursors.cpp b/src/library/aux_recursors.cpp
index 002777e81..a2a5497b6 100644
--- a/src/library/aux_recursors.cpp
+++ b/src/library/aux_recursors.cpp
@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 
 Author: Leonardo de Moura
 */
+#include <string>
 #include "library/aux_recursors.h"
 #include "library/scoped_ext.h"
 #include "library/module.h"