diff --git a/CMakeLists.txt b/CMakeLists.txt
index 88a65f7..51cd864 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,6 +96,7 @@ set(sources
     src/PythonQtQFileImporter.cpp
     src/PythonQtSignalReceiver.cpp
     src/PythonQtSlot.cpp
+    src/PythonQtSignal.cpp
     src/PythonQtStdDecorators.cpp
     src/PythonQtStdIn.cpp
     src/PythonQtStdOut.cpp