diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index 217a295..1606881 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -184,6 +184,7 @@
 	    test_quickfix.res \
 	    test_quotestar.res \
 	    test_retab.res \
+	    test_registers.res \
 	    test_ruby.res \
 	    test_search.res \
 	    test_signs.res \