diff --git a/src/QZXing-components.pri b/src/QZXing-components.pri
index 0a8d257..d3da3a9 100644
--- a/src/QZXing-components.pri
+++ b/src/QZXing-components.pri
@@ -410,6 +410,7 @@ qzxing_multimedia {
     CONFIG += qzxing_qml
 
     DEFINES += QZXING_MULTIMEDIA
+	PRL_EXPORT_DEFINES += QZXING_MULTIMEDIA
 
     HEADERS += \
         $$PWD/QZXingFilter.h
@@ -423,6 +424,7 @@ qzxing_qml {
     greaterThan(QT_MAJOR_VERSION, 4): QT += quick
 
     DEFINES += QZXING_QML
+	PRL_EXPORT_DEFINES += QZXING_QML
 
     HEADERS +=  \
         $$PWD/QZXingImageProvider.h