diff --git a/src/iothread.cpp b/src/iothread.cpp
index 9e252260b..21017fbe7 100644
--- a/src/iothread.cpp
+++ b/src/iothread.cpp
@@ -14,7 +14,6 @@
 
 #include <atomic>
 #include <condition_variable>
-#include <cstdint> // for uint64_t
 #include <functional>
 #include <queue>
 
diff --git a/src/iothread.h b/src/iothread.h
index 5d91b2b34..bdb045dfc 100644
--- a/src/iothread.h
+++ b/src/iothread.h
@@ -4,6 +4,7 @@
 
 #include <pthread.h>
 
+#include <cstdint> // for uint64_t
 #include <functional>
 #include <type_traits>