diff -Nur a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2011-02-10 11:03:43.000000000 +0100
+++ b/CMakeLists.txt	2014-08-18 19:07:13.554038111 +0200
@@ -23,6 +23,8 @@
 include(DefineInstallationPaths.cmake)
 include(DefineCPackDefaults.cmake)
 
+find_package(Qt4 REQUIRED)
+
 subdirs(
 	libs/3rdparty
 )