diff --git a/src/library/parray.h b/src/library/parray.h
index a792abfe9b..9f6ca0fec0 100644
--- a/src/library/parray.h
+++ b/src/library/parray.h
@@ -5,6 +5,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Author: Leonardo de Moura
 */
 #pragma once
+#include <utility>
 #include <memory>
 #include <algorithm>
 #include "util/memory_pool.h"
diff --git a/src/library/vm/vm_array.cpp b/src/library/vm/vm_array.cpp
index 46ed5b397d..1bdc2b6ab7 100644
--- a/src/library/vm/vm_array.cpp
+++ b/src/library/vm/vm_array.cpp
@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 
 Author: Leonardo de Moura
 */
+#include <vector>
 #include "library/parray.h"
 #include "library/vm/vm.h"
 #include "library/vm/vm_nat.h"
diff --git a/src/tests/library/parray.cpp b/src/tests/library/parray.cpp
index bc2cbc8da7..15b30aa388 100644
--- a/src/tests/library/parray.cpp
+++ b/src/tests/library/parray.cpp
@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 
 Author: Leonardo de Moura
 */
+#include <utility>
 #include <random>
 #include <vector>
 #include "util/test.h"
diff --git a/tests/lean/run/smt_array.lean b/tests/lean/run/smt_array.lean
index bcc80cb52e..03aca38f6a 100644
--- a/tests/lean/run/smt_array.lean
+++ b/tests/lean/run/smt_array.lean
@@ -1,3 +1,4 @@
+namespace hide
 constant array : Type
 constant read : array → nat → nat
 constant write : array → nat → nat → array
@@ -16,3 +17,5 @@ read a5 4 = read a1 4
 begin [smt]
   intros, eblast
 end
+
+end hide