diff --git a/common/algorithms/hashes.h b/common/algorithms/hashes.h
index 48d20f079e..6da073f881 100644
--- a/common/algorithms/hashes.h
+++ b/common/algorithms/hashes.h
@@ -6,6 +6,7 @@
 #define ENGINE_HASHES_H
 
 #include <array>
+#include <cstdint>
 #include <functional>
 #include <iterator>
 #include <numeric>
diff --git a/common/algorithms/string-algorithms.h b/common/algorithms/string-algorithms.h
index 133dc5328b..ba6f062518 100644
--- a/common/algorithms/string-algorithms.h
+++ b/common/algorithms/string-algorithms.h
@@ -4,6 +4,8 @@
 
 #pragma once
 
+#include <cstdint>
+
 #include "common/functional/identity.h"
 #include "common/smart_iterators/transform_iterator.h"
 #include "common/wrappers/string_view.h"
diff --git a/compiler/compiler-settings.h b/compiler/compiler-settings.h
index 11342b99e7..dc00a23c08 100644
--- a/compiler/compiler-settings.h
+++ b/compiler/compiler-settings.h
@@ -3,6 +3,8 @@
 // Distributed under the GPL v3 License, see LICENSE.notice.txt
 
 #pragma once
+
+#include <cstdint>
 #include <string>
 #include <tuple>
 #include <vector>
diff --git a/compiler/data/performance-inspections.h b/compiler/data/performance-inspections.h
index 74f5e4423a..fef611a25f 100644
--- a/compiler/data/performance-inspections.h
+++ b/compiler/data/performance-inspections.h
@@ -3,9 +3,11 @@
 // Distributed under the GPL v3 License, see LICENSE.notice.txt
 
 #pragma once
-#include "compiler/data/data_ptr.h"
-#include "common/wrappers/string_view.h"
 
+#include <cstdint>
+
+#include "common/wrappers/string_view.h"
+#include "compiler/data/data_ptr.h"
 
 class PerformanceInspections {
 public:
diff --git a/compiler/ffi/ffi_types.h b/compiler/ffi/ffi_types.h
index f4ef733cd0..146e763a3b 100644
--- a/compiler/ffi/ffi_types.h
+++ b/compiler/ffi/ffi_types.h
@@ -4,9 +4,10 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
-#include <vector>
 #include <unordered_map>
+#include <vector>
 
 enum class FFITypeKind: uint16_t {
   Unknown,
diff --git a/compiler/inferring/multi-key.h b/compiler/inferring/multi-key.h
index 66219618f7..dd41bf2220 100644
--- a/compiler/inferring/multi-key.h
+++ b/compiler/inferring/multi-key.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
 #include <vector>
 
diff --git a/compiler/stage.h b/compiler/stage.h
index 7d40ddc894..9b14a947b0 100644
--- a/compiler/stage.h
+++ b/compiler/stage.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <unistd.h>
 
 #include "compiler/data/data_ptr.h"