diff --git a/src/rwrapper.cpp b/src/rwrapper.cpp
index 34ba469..e96f18c 100644
--- a/src/rwrapper.cpp
+++ b/src/rwrapper.cpp
@@ -1,3 +1,5 @@
+#include <cstdint>
+
 #include <Rdefines.h>
 
 extern "C" {