diff --git a/src/lib/lumitime.hpp b/src/lib/lumitime.hpp
index 6891ce064..9f13d48f8 100644
--- a/src/lib/lumitime.hpp
+++ b/src/lib/lumitime.hpp
@@ -28,6 +28,7 @@
 #include <string>
 
 extern "C" {
+#include <stdint.h>
 #include <gavl/gavltime.h>
 }