diff --git a/src/testdir/Make_os2.mak b/src/testdir/Make_os2.mak
index 7277556..6ff7a6b 100644
--- a/src/testdir/Make_os2.mak
+++ b/src/testdir/Make_os2.mak
@@ -55,6 +55,7 @@
 		test_listlbr_utf8.out \
 		test_mapping.out \
 		test_marks.out \
+		test_match_conceal.out \
 		test_nested_function.out \
 		test_options.out \
 		test_perl.out \