diff --git a/chacha/README.md b/chacha/README.md
index 9829b00..a7d6de9 100644
--- a/chacha/README.md
+++ b/chacha/README.md
@@ -6,3 +6,5 @@ implementation for generic CPUs (ALU), and the SSE2/3 and AVX2
 instruction sets.
 The implementations are all based on Public Domain code by
 D. J. Bernstein and others.
+
+The source code is dedicated to the Public Domain under the [Unlicense](https://unlicense.org/UNLICENSE).
diff --git a/chacha/chacha.cc b/chacha/chacha.cc
index 77a7840..942a9e4 100644
--- a/chacha/chacha.cc
+++ b/chacha/chacha.cc
@@ -7,6 +7,7 @@
 
 #include "chacha.hh"
 
+#include <vector>
 #include <cstdio>
 #include <ctime>
 #include <string>
diff --git a/shishua/README.md b/shishua/README.md
index 537e6b8..f7d27d6 100644
--- a/shishua/README.md
+++ b/shishua/README.md
@@ -6,3 +6,5 @@ implementation for generic CPUs (ALU), and it includes SSE2/3
 and AVX2 instruction set veriants.
 The implementations are all based on Public Domain code from
 [Thaddée Tyl](https://github.com/espadrine): https://github.com/espadrine/shishua
+
+The source code is dedicated to the Public Domain under the [Unlicense](https://unlicense.org/UNLICENSE).