diff --git a/test/tests/S6ImportExportTests.cpp b/test/tests/S6ImportExportTests.cpp
index 3e1f448239..85b812342c 100644
--- a/test/tests/S6ImportExportTests.cpp
+++ b/test/tests/S6ImportExportTests.cpp
@@ -29,6 +29,7 @@
 #include <openrct2/ride/Ride.h>
 #include <openrct2/world/Park.h>
 #include <openrct2/world/Sprite.h>
+#include <stdio.h>
 #include <string>
 
 using namespace OpenRCT2;