diff --git a/src/plugins/yy/yy.pro b/src/plugins/yy/yy.pro
index a06d9df7..9c4f2ed9 100644
--- a/src/plugins/yy/yy.pro
+++ b/src/plugins/yy/yy.pro
@@ -2,6 +2,8 @@ include(../plugin.pri)
 
 DEFINES += YY_LIBRARY
 
-SOURCES += yyplugin.cpp
+SOURCES += yyplugin.cpp \
+    jsonwriter.cpp
 HEADERS += yyplugin.h \
-    yy_global.h
+    yy_global.h \
+    jsonwriter.h