diff -ruN krita-2.3.1.orig/krita/ui/CMakeLists.txt krita-2.3.1/krita/ui/CMakeLists.txt
--- krita-2.3.1.orig/krita/ui/CMakeLists.txt	2011-01-15 21:07:11.000000000 +0100
+++ krita-2.3.1/krita/ui/CMakeLists.txt	2011-01-23 18:56:56.824000099 +0100
@@ -216,6 +216,10 @@
 
 target_link_libraries(kritaui ${KDE4_THREADWEAVER_LIBRARIES} kritaimage komain kowidgets ${PNG_LIBRARIES} ${EXIV2_LIBRARIES})
 
+IF(Q_WS_X11)
+    TARGET_LINK_LIBRARIES(kritaui ${X11_LIBRARIES})
+ENDIF(Q_WS_X11)
+
 if(HAVE_OPENGL)
     target_link_libraries(kritaui ${OPENGL_LIBRARIES} ${QT_QTOPENGL_LIBRARY} ${OPENEXR_LIBRARIES})
     set (GL_INTERFACE_LIBRARIES ";${OPENGL_LIBRARIES};${QT_QTOPENGL_LIBRARY}")