diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index 513fd89..e1ce151 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -170,6 +170,7 @@
 	    test_listlbr.res \
 	    test_listlbr_utf8.res \
 	    test_lua.res \
+	    test_makeencoding.res \
 	    test_man.res \
 	    test_marks.res \
 	    test_matchadd_conceal.res \