diff --git a/kalarm.spec b/kalarm.spec
index 650e4ba..f92c60e 100644
--- a/kalarm.spec
+++ b/kalarm.spec
@@ -49,6 +49,7 @@ BuildRequires: cmake(KF5DocTools)
 BuildRequires: cmake(KF5GlobalAccel)
 BuildRequires: cmake(KF5GuiAddons)
 BuildRequires: cmake(KF5I18n)
+BuildRequires: cmake(KF5IdleTime)
 BuildRequires: cmake(KF5IconThemes)
 BuildRequires: cmake(KF5JobWidgets)
 BuildRequires: cmake(KF5KCMUtils)