diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -59,7 +59,7 @@
 set(KWINDOWSYSTEM_HAVE_X11 ${X11_FOUND})
 
 if(X11_FOUND)
-    find_package(XCB COMPONENTS XCB KEYSYMS RES)
+    find_package(XCB COMPONENTS REQUIRED XCB KEYSYMS RES)
     find_package(Qt5 ${REQUIRED_QT_VERSION} CONFIG REQUIRED X11Extras)
     set_package_properties(X11_Xrender PROPERTIES DESCRIPTION "X Rendering Extension (libXrender)"
                            URL "http://www.x.org" TYPE RECOMMENDED