diff --git a/qmsgpack.pri b/qmsgpack.pri
index c0caae2..8ad2460 100644
--- a/qmsgpack.pri
+++ b/qmsgpack.pri
@@ -26,6 +26,10 @@ HEADERS += \
     $$PWD/src/stream/time.h \
     $$PWD/src/stream/geometry.h
 
+qtHaveModule(gui) {
+    QT += gui
+}
+
 qtHaveModule(location) {
     QT += location
 
diff --git a/src/src.pro b/src/src.pro
index d71d5bf..d330ca5 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -1,4 +1,4 @@
-QT       += core gui
+QT       += core
 
 TARGET = qmsgpack
 CONFIG   -= app_bundle
@@ -46,6 +46,10 @@ STREAM_HEADERS_INSTALL = \
     stream/geometry.h \
     stream/time.h
 
+qtHaveModule(gui) {
+    QT += gui
+}
+
 qtHaveModule(location) {
     QT += location