diff --git a/src/testdir/Make_os2.mak b/src/testdir/Make_os2.mak
index d593bb2..a0fd3a0 100644
--- a/src/testdir/Make_os2.mak
+++ b/src/testdir/Make_os2.mak
@@ -69,7 +69,8 @@
 		test_signs.out \
 		test_tagcase.out \
 		test_textobjects.out \
-		test_utf8.out
+		test_utf8.out \
+		test_writefile.out
 
 SCRIPTS_BENCH = bench_re_freeze.out