diff --git a/platform/qt/qsacn_global.h b/platform/qt/qsacn_global.h
index f640cf4..fc47c9d 100644
--- a/platform/qt/qsacn_global.h
+++ b/platform/qt/qsacn_global.h
@@ -2,7 +2,7 @@
 
 #include <QtCore/qglobal.h>
 
-#if defined(QT_LIBRARY)
+#if defined(QsACN_LIBRARY)
 #  define QT_EXPORT Q_DECL_EXPORT
 #else
 #  define QT_EXPORT Q_DECL_IMPORT