diff --git a/headers/private/mail/NodeMessage.h b/headers/private/mail/NodeMessage.h
index 302d5cf00a..b2d46dbb86 100644
--- a/headers/private/mail/NodeMessage.h
+++ b/headers/private/mail/NodeMessage.h
@@ -23,7 +23,7 @@
 #include <Node.h>
 #include <Message.h>
 
-#if defined(HAIKU_TARGET_PLATFORM_DANO) || defined(HAIKU_TARGET_PLATFORM_HAIKU)
+#if defined(HAIKU_TARGET_PLATFORM_DANO) || defined(HAIKU_TARGET_PLATFORM_HAIKU) || defined(HAIKU_TARGET_PLATFORM_LIBBE_TEST)
 #define _IMPEXP_MAIL
 #endif