diff --git a/src/testdir/Make_os2.mak b/src/testdir/Make_os2.mak
index 31023ea..7cdfcb1 100644
--- a/src/testdir/Make_os2.mak
+++ b/src/testdir/Make_os2.mak
@@ -44,6 +44,7 @@
 		test_changelist.out \
 		test_close_count.out \
 		test_command_count.out \
+		test_erasebackword.out \
 		test_eval.out \
 		test_insertcount.out \
 		test_listlbr.out \