diff --git a/support/cpp_interface/libics.hpp b/support/cpp_interface/libics.hpp
index 73f76e6..4ea2b1e 100644
--- a/support/cpp_interface/libics.hpp
+++ b/support/cpp_interface/libics.hpp
@@ -40,6 +40,7 @@
 #include <string>
 #include <utility>
 #include <vector>
+#include <cstdint>
 
 #if defined(__WIN32__) && !defined(WIN32)
 #  define WIN32