diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7b5a01d11..643cac920 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -151,7 +151,7 @@ kde4_add_ui_files(okularpart_SRCS
    conf/dlgpresentationbase.ui
 )
 
-qt4_add_dbus_interfaces(okularpart_SRCS ${DBUS_INTERFACES_INSTALL_DIR}/org.kde.KSpeech.xml)
+qt4_add_dbus_interfaces(okularpart_SRCS ${KDE4_DBUS_INTERFACES_DIR}/org.kde.KSpeech.xml)
 
 kde4_add_plugin(okularpart ${okularpart_SRCS})