diff --git a/oracle/CMakeLists.txt b/oracle/CMakeLists.txt
index 6f4e18c9..c23dfc4e 100644
--- a/oracle/CMakeLists.txt
+++ b/oracle/CMakeLists.txt
@@ -4,7 +4,7 @@ PROJECT(oracle)
 # paths
 set(DESKTOPDIR share/applications CACHE STRING "path to .desktop files")
 
-SET(oracle_SOURCES src/main.cpp src/oracleimporter.cpp src/window_main.cpp ../cockatrice/src/carddatabase.cpp ../cockatrice/src/settingscache.cpp)
+SET(oracle_SOURCES src/main.cpp src/oracleimporter.cpp src/window_main.cpp ../cockatrice/src/carddatabase.cpp ../cockatrice/src/settingscache.cpp ../cockatrice/src/qt-json/json.cpp)
 SET(oracle_HEADERS src/oracleimporter.h src/window_main.h ../cockatrice/src/carddatabase.h ../cockatrice/src/settingscache.h)
 
 SET(QT_USE_QTNETWORK TRUE)