diff --git a/sandboxed_api/sandbox2/syscall.h b/sandboxed_api/sandbox2/syscall.h
index a489b1d0..b4e5bd08 100644
--- a/sandboxed_api/sandbox2/syscall.h
+++ b/sandboxed_api/sandbox2/syscall.h
@@ -26,7 +26,7 @@
 #include <string>
 #include <vector>
 
-#include "sandboxed_api/config.h"
+#include "sandboxed_api/config.h"  // IWYU pragma: export
 
 namespace sandbox2 {