diff --git a/pws2mqtt-qt.pro b/pws2mqtt-qt.pro
index c346d13..dc261e9 100644
--- a/pws2mqtt-qt.pro
+++ b/pws2mqtt-qt.pro
@@ -16,7 +16,8 @@ CONFIG -= app_bundle
 SOURCES += \
 main.cpp \
 mqtt.cpp \
-pws2mqtt.cpp
+pws2mqtt.cpp \
+    utcicalculator.cpp
 
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin
@@ -27,5 +28,6 @@ HEADERS += \
 httpserver.h \
 mqtt.h \
 pws2mqtt.h \
+    utcicalculator.h \
 version.h