diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -91,6 +91,7 @@
     KF5::AkonadiCore
     KF5::AkonadiPrivate
     KF5::AkonadiContact
+    KF5::AkonadiWidgets
     KF5::AkonadiXml
     KF5::CalendarSupport
     KF5::CalendarCore