diff --git a/cpp/negentropy/encoding.h b/cpp/negentropy/encoding.h
index c6d5bd6..80c38b5 100644
--- a/cpp/negentropy/encoding.h
+++ b/cpp/negentropy/encoding.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <stdint.h>
 #include <string_view>