diff --git a/tests/libtest/Makefile.inc b/tests/libtest/Makefile.inc
index 97b9df73b5..3e64075c26 100644
--- a/tests/libtest/Makefile.inc
+++ b/tests/libtest/Makefile.inc
@@ -345,7 +345,7 @@ lib694_SOURCES = lib694.c $(SUPPORTFILES)
 
 lib695_SOURCES = lib695.c $(SUPPORTFILES)
 
-lib696_SOURCES = lib556.c $(SUPPORTFILES)
+lib696_SOURCES = lib556.c $(SUPPORTFILES) $(WARNLESS)
 lib696_CPPFLAGS = $(AM_CPPFLAGS) -DLIB696
 
 lib1301_SOURCES = lib1301.c $(SUPPORTFILES) $(TESTUTIL)