diff --git a/Buffer.h b/Buffer.h
index f8f21c4..3827a6e 100644
--- a/Buffer.h
+++ b/Buffer.h
@@ -5,6 +5,7 @@
 #define KTE_BUFFER_H
 
 #include <cstddef>
+#include <memory>
 #include <string>
 #include <vector>
 #include <string_view>
diff --git a/UndoNode.h b/UndoNode.h
index dd8d5fe..d098a67 100644
--- a/UndoNode.h
+++ b/UndoNode.h
@@ -1,10 +1,11 @@
 #ifndef KTE_UNDONODE_H
 #define KTE_UNDONODE_H
 
+#include <cstdint>
 #include <string>
 
 
-enum class UndoType : uint8_t {
+enum class UndoType : std::uint8_t {
 	Insert,
 	Delete,
 	Paste,