diff --git a/src/testdir/Make_os2.mak b/src/testdir/Make_os2.mak
index 224f695..7b5775c 100644
--- a/src/testdir/Make_os2.mak
+++ b/src/testdir/Make_os2.mak
@@ -55,6 +55,7 @@
 		test_nested_function.out \
 		test_options.out \
 		test_qf_title.out \
+		test_set.out \
 		test_signs.out \
 		test_textobjects.out \
 		test_utf8.out