diff --git a/src/testdir/Make_os2.mak b/src/testdir/Make_os2.mak
index f5262e2..46e9b6c 100644
--- a/src/testdir/Make_os2.mak
+++ b/src/testdir/Make_os2.mak
@@ -27,7 +27,7 @@
 		test56.out test57.out test58.out test59.out test60.out \
 		test61.out test62.out test63.out test64.out test65.out \
 		test66.out test67.out test68.out test69.out test70.out \
-		test71.out test72.out
+		test71.out test72.out test73.out
 
 .SUFFIXES: .in .out