diff --git a/M17Utils.cpp b/M17Utils.cpp
index 8edd96a..38e1445 100644
--- a/M17Utils.cpp
+++ b/M17Utils.cpp
@@ -21,6 +21,7 @@
 
 #if defined(USE_M17)
 
+#include <cstdint>
 #include <cassert>
 
 const std::string M17_CHARS = " ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-/.";
diff --git a/NullController.cpp b/NullController.cpp
index edfeffe..eeb7717 100644
--- a/NullController.cpp
+++ b/NullController.cpp
@@ -19,6 +19,7 @@
 #include "NullController.h"
 
 #include <cstdio>
+#include <cstdint>
 #include <cassert>
 
 const unsigned char MMDVM_FRAME_START = 0xE0U;