diff --git a/src/Library/Base64.hpp b/src/Library/Base64.hpp

index 0947f21..aa76311 100644

--- a/src/Library/Base64.hpp

+++ b/src/Library/Base64.hpp

@@ -24,6 +24,7 @@

 #include <string>

 #include <cstddef>

+#include <cstdint>

 namespace usbguard

 {