diff --git a/cmake/KDAB/modules/KDInstallLocation.cmake b/cmake/KDAB/modules/KDInstallLocation.cmake
index 9f3cc653..74b4559f 100644
--- a/cmake/KDAB/modules/KDInstallLocation.cmake
+++ b/cmake/KDAB/modules/KDInstallLocation.cmake
@@ -30,7 +30,7 @@ if(NOT INSTALL_DATADIR)
     set(INSTALL_DATADIR ${CMAKE_INSTALL_DATADIR})
 endif()
 if(NOT INSTALL_DOC_DIR)
-    set(INSTALL_DOC_DIR ${CMAKE_INSTALL_DOCDIR}${KDDockWidgets_LIBRARY_QTID})
+    set(INSTALL_DOC_DIR ${CMAKE_INSTALL_DOCDIR}${${PROJECT_NAME}_LIBRARY_QTID})
 endif()
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)