diff --git a/src/smtpexports.h b/src/smtpexports.h
index 0c4919f..cfee5cd 100644
--- a/src/smtpexports.h
+++ b/src/smtpexports.h
@@ -3,8 +3,10 @@
 
 #ifdef SMTP_BUILD
 #define SMTP_EXPORT Q_DECL_EXPORT
-#else
+#elseif SMTP_USE
 #define SMTP_EXPORT Q_DECL_IMPORT
+#else
+#define SMTP_EXPORT
 #endif
 
 #endif // SMTPEXPORTS_H