diff --git a/CMakeLists.txt b/CMakeLists.txt
index d955574a..c9b37b8a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -302,7 +302,7 @@ make_install_path_absolute(KDE4WORKSPACE_DBUS_SERVICES_DIR   ${DBUS_SERVICES_INS
 make_install_path_absolute(KDE4WORKSPACE_SERVICES_DIR ${SERVICES_INSTALL_DIR})
 make_install_path_absolute(KDE4WORKSPACE_SERVICETYPES_DIR ${SERVICETYPES_INSTALL_DIR})
 
-set(KDE4WORKSPACE_TARGET_PREFIX KDE4Workspace__)
+set(KDE4WORKSPACE_TARGET_PREFIX KDE4Workspace::)
 
 configure_file(
     KDE4WorkspaceConfig.cmake.in