diff --git a/src/openrct2/Diagnostic.h b/src/openrct2/Diagnostic.h
index dbb9204e92..38638ef5e1 100644
--- a/src/openrct2/Diagnostic.h
+++ b/src/openrct2/Diagnostic.h
@@ -10,7 +10,7 @@
 #ifndef _DIAGNOSTIC_H_
 #define _DIAGNOSTIC_H_
 
-#include "common.h"
+#include <cstdint>
 
 enum DIAGNOSTIC_LEVEL {
     DIAGNOSTIC_LEVEL_FATAL,