diff -ruN kvkbd-0.6.orig/src/CMakeLists.txt kvkbd-0.6/src/CMakeLists.txt
--- kvkbd-0.6.orig/src/CMakeLists.txt	2008-10-11 14:28:19.000000000 +0200
+++ kvkbd-0.6/src/CMakeLists.txt	2011-08-11 22:09:05.129295607 +0200
@@ -22,7 +22,7 @@
 
 kde4_add_executable(kvkbd ${kvkbd_SRCS})
 
-target_link_libraries(kvkbd ${KDE4_KDECORE_LIBS} Xtst ${KDE4_KDEUI_LIBS})
+target_link_libraries(kvkbd ${KDE4_KDECORE_LIBS} Xtst ${KDE4_KDEUI_LIBS} ${X11_LIBRARIES})
 
 install(TARGETS kvkbd ${INSTALL_TARGETS_DEFAULT_ARGS})