diff --git a/bin/tests/system/builtin/Makefile.in b/bin/tests/system/builtin/Makefile.in
index 3008d06260..1d2f60ac83 100644
--- a/bin/tests/system/builtin/Makefile.in
+++ b/bin/tests/system/builtin/Makefile.in
@@ -29,7 +29,7 @@ CDEFINES =
 CWARNINGS =
 
 DNSLIBS =
-ISCLIBS =
+ISCLIBS = ../../../../lib/isc/libisc.@A@
 
 DNSDEPLIBS =
 ISCDEPLIBS =