diff --git a/ngc_ext.cpp b/ngc_ext.cpp
index 992595e..92e891f 100644
--- a/ngc_ext.cpp
+++ b/ngc_ext.cpp
@@ -1,6 +1,7 @@
 #include "./ngc_ext.hpp"
 
 //#include <cstdint>
+#include <cstdio>
 #include <new>
 
 #ifndef EXTRA_LOGGING