diff --git a/messagecore/src/attachment/attachmentupdatejob.h b/messagecore/src/attachment/attachmentupdatejob.h
--- a/messagecore/src/attachment/attachmentupdatejob.h
+++ b/messagecore/src/attachment/attachmentupdatejob.h
@@ -25,7 +25,7 @@
 #include "attachmentpart.h"
 
 namespace MessageCore {
-class MESSAGECORE_TESTS_EXPORT AttachmentUpdateJob : public KJob
+class MESSAGECORE_EXPORT AttachmentUpdateJob : public KJob
 {
     Q_OBJECT
 public: