diff --git a/projects/SelfTest/UsageTests/Tricky.tests.cpp b/projects/SelfTest/UsageTests/Tricky.tests.cpp
index 55fe6230..41d0adf4 100644
--- a/projects/SelfTest/UsageTests/Tricky.tests.cpp
+++ b/projects/SelfTest/UsageTests/Tricky.tests.cpp
@@ -17,7 +17,7 @@
 
 #include "catch.hpp"
 
-#include <stdio.h>
+#include <cstdio>
 #include <sstream>
 #include <iostream>