diff --git a/kf5-kidletime.spec b/kf5-kidletime.spec
index 1bb6914..90e1c37 100644
--- a/kf5-kidletime.spec
+++ b/kf5-kidletime.spec
@@ -25,7 +25,7 @@ BuildRequires:  kf5-rpm-macros >= %{version}
 BuildRequires:  qt5-qtbase-devel
 BuildRequires:  qt5-qtx11extras-devel
 
-BuildRequires:  pkgconfig(Xext)
+BuildRequires:  pkgconfig(xext)
 BuildRequires:  pkgconfig(x11-xcb)
 BuildRequires:  pkgconfig(xcb)
 BuildRequires:  pkgconfig(xcb-sync)