diff --git a/config/makefiles/root.in b/config/makefiles/root.in
index e104cf2..80da812 100644
--- a/config/makefiles/root.in
+++ b/config/makefiles/root.in
@@ -8,7 +8,7 @@ PARROT_ARGS   :=
 VERSION       := @versiondir@
 BIN_DIR       := @bindir@
 LIB_DIR       := @libdir@$(VERSION)
-DOC_DIR       := @doc_dir@$(VERSION)
+DOC_DIR       := @docdir@$(VERSION)
 MANDIR        := @mandir@$(VERSION)
 
 # Set up extensions