diff --git a/libamqpprox/amqpprox_backendset.h b/libamqpprox/amqpprox_backendset.h
index 0466c40..6e61894 100644
--- a/libamqpprox/amqpprox_backendset.h
+++ b/libamqpprox/amqpprox_backendset.h
@@ -18,6 +18,7 @@
 
 #include <amqpprox_backend.h>
 
+#include <cstdint>
 #include <vector>
 
 namespace Bloomberg {
diff --git a/libamqpprox/amqpprox_connectionmanager.h b/libamqpprox/amqpprox_connectionmanager.h
index 810f4a5..8ee315b 100644
--- a/libamqpprox/amqpprox_connectionmanager.h
+++ b/libamqpprox/amqpprox_connectionmanager.h
@@ -18,6 +18,7 @@
 
 #include <amqpprox_backendset.h>
 
+#include <cstdint>
 #include <memory>
 #include <vector>
 
diff --git a/libamqpprox/amqpprox_types.cpp b/libamqpprox/amqpprox_types.cpp
index 0d67307..c772ba1 100644
--- a/libamqpprox/amqpprox_types.cpp
+++ b/libamqpprox/amqpprox_types.cpp
@@ -23,6 +23,8 @@
 
 #include <boost/endian/arithmetic.hpp>
 
+#include <cstdint>
+
 // Note this is not 'pure' AMQP 0-9-1  aiming for the same compatibility as the
 // server see https://www.rabbitmq.com/amqp-0-9-1-errata.html &
 // https://github.com/rabbitmq/rabbitmq-server/blob/master/deps/rabbit_common/src/rabbit_binary_parser.erl
diff --git a/libamqpprox/amqpprox_types.h b/libamqpprox/amqpprox_types.h
index ecd0429..a66fcd0 100644
--- a/libamqpprox/amqpprox_types.h
+++ b/libamqpprox/amqpprox_types.h
@@ -16,6 +16,7 @@
 #ifndef BLOOMBERG_AMQPPROX_TYPES
 #define BLOOMBERG_AMQPPROX_TYPES
 
+#include <cstdint>
 #include <cstring>
 #include <string>
 #include <vector>