diff --git a/KF5DocToolsMacros.cmake b/KF5DocToolsMacros.cmake
--- a/KF5DocToolsMacros.cmake
+++ b/KF5DocToolsMacros.cmake
@@ -63,13 +63,13 @@
 #
 #   KDOCTOOLS_INSTALL(po) does the following:
 #   - Create man pages from footool.1.docbook and footool.conf.5.docbook,
-#     install them in ${MAN_INSTALL_DIR}/fr
+#     install them in ${KDE_INSTALL_MANDIR}/fr
 #   - Create handbooks from index.docbook files, install the one from the
-#     fooslave/ directory in ${HTML_INSTALL_DIR}/fr/kioslave5/fooslave
-#     and the one from the docs/ directory in $[HTML_INSTALL_DIR}/fr
+#     fooslave/ directory in ${KDE_INSTALL_DOCBUNDLEDIR}/fr/kioslave5/fooslave
+#     and the one from the docs/ directory in ${KDE_INSTALL_DOCBUNDLEDIR}/fr
 #
-#   If ${HTML_INSTALL_DIR} is not set, share/doc/HTML is used instead.
-#   If ${MAN_INSTALL_DIR} is not set, share/man/<lang> is used instead.
+#   If ${KDE_INSTALL_DOCBUNDLEDIR} is not set, share/doc/HTML is used instead.
+#   If ${KDE_INSTALL_MANDIR} is not set, share/man/<lang> is used instead.
 #
 #  KDOCTOOLS_MEINPROC_EXECUTABLE - the meinproc5 executable
 #
@@ -232,11 +232,19 @@
 
 function(kdoctools_install podir)
     file(GLOB lang_dirs "${podir}/*")
-    if (NOT MAN_INSTALL_DIR)
-        set(MAN_INSTALL_DIR share/man)
+    if (NOT KDE_INSTALL_MANDIR)
+        if (MAN_INSTALL_DIR) # TODO KF6: deprecated, remove
+            set(KDE_INSTALL_MANDIR ${MAN_INSTALL_DIR})
+        else()
+            set(KDE_INSTALL_MANDIR share/man)
+        endif()
     endif()
-    if (NOT HTML_INSTALL_DIR)
-        set(HTML_INSTALL_DIR share/doc/HTML)
+    if (NOT KDE_INSTALL_DOCBUNDLEDIR)
+        if (HTML_INSTALL_DIR) # TODO KF6: deprecated, remove
+            set(KDE_INSTALL_DOCBUNDLEDIR ${HTML_INSTALL_DIR})
+        else()
+            set(KDE_INSTALL_DOCBUNDLEDIR share/doc/HTML)
+        endif()
     endif()
     foreach(lang_dir ${lang_dirs})
         get_filename_component(lang ${lang_dir} NAME)
@@ -246,13 +254,13 @@
             string(REGEX MATCH "\\.([0-9])\\.docbook" match ${docbook})
             if (match)
                 kdoctools_create_manpage(${docbook} ${CMAKE_MATCH_1}
-                    INSTALL_DESTINATION ${MAN_INSTALL_DIR}/${lang}
+                    INSTALL_DESTINATION ${KDE_INSTALL_MANDIR}/${lang}
                 )
             else()
                 string(REGEX MATCH "${lang_dir}/docs/(.*)/index.docbook" match ${docbook})
                 if (match)
                     kdoctools_create_handbook(${docbook}
-                        INSTALL_DESTINATION ${HTML_INSTALL_DIR}/${lang}
+                        INSTALL_DESTINATION ${KDE_INSTALL_DOCBUNDLEDIR}/${lang}
                         SUBDIR ${CMAKE_MATCH_1}
                     )
                 endif()