diff --git a/desktop-widgets/CMakeLists.txt b/desktop-widgets/CMakeLists.txt
index 9bc71e5e3..4d4ed03c9 100644
--- a/desktop-widgets/CMakeLists.txt
+++ b/desktop-widgets/CMakeLists.txt
@@ -16,6 +16,8 @@ include_directories(.
 	${CMAKE_BINARY_DIR}
 )
 
+set(CMAKE_AUTOMOC ON)
+
 add_subdirectory(preferences)
 
 set (SUBSURFACE_UI