diff --git a/libs/core/core.pro b/libs/core/core.pro
index 503edaf..f563d53 100644
--- a/libs/core/core.pro
+++ b/libs/core/core.pro
@@ -2,8 +2,10 @@ QT += core widgets
 TEMPLATE = lib
 CONFIG += staticlib c++17
 
-SOURCES += $$files($$PWD/*.cpp, true)
-HEADERS += $$files($$PWD/*.h, true)
+SOURCES += $$files($$PWD/*.cpp, true) \
+    xdatastream.cpp
+HEADERS += $$files($$PWD/*.h, true) \
+    xdatastream.h
 
 LIBS += -L$$OUT_PWD/../libs/xassets -lxassets