diff --git a/include/istatecallback.h b/include/istatecallback.h
index 7b0db7f..4ec1a40 100644
--- a/include/istatecallback.h
+++ b/include/istatecallback.h
@@ -24,6 +24,7 @@
 
 // std
 #include <ostream>
+#include <cstdint>
 
 // boost
 #include <boost/signals2.hpp>
diff --git a/include/token.h b/include/token.h
index 7db2917..93eadce 100644
--- a/include/token.h
+++ b/include/token.h
@@ -25,6 +25,7 @@
 // std
 #include <ostream>
 #include <string>
+#include <cstdint>
 
 // paho
 #include <MQTTAsync.h>
diff --git a/src/ihistogram.cpp b/src/ihistogram.cpp
index 0ff28da..9be3f89 100644
--- a/src/ihistogram.cpp
+++ b/src/ihistogram.cpp
@@ -26,6 +26,7 @@
 #include <iomanip>
 #include <numeric>
 #include <sstream>
+#include <cstdint>
 
 namespace osdev {
 namespace components {