diff --git a/tests/unit/Makefile.am b/tests/unit/Makefile.am
index e2fdd8760d..9cccf2fa76 100644
--- a/tests/unit/Makefile.am
+++ b/tests/unit/Makefile.am
@@ -5,7 +5,7 @@
 #                            | (__| |_| |  _ <| |___
 #                             \___|\___/|_| \_\_____|
 #
-# Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
 #
 # This software is licensed as described in the file COPYING, which
 # you should have received as part of this distribution. The terms
@@ -57,7 +57,7 @@ LIBS = $(BLANK_AT_MAKETIME)
 
 LDADD = $(top_builddir)/src/libcurltool.la   \
         $(top_builddir)/lib/libcurlu.la      \
-        @LDFLAGS@ @LIBCURL_LIBS@
+        @LDFLAGS@ @LIBCURL_LIBS@ @NSS_LIBS@
 
 AM_CPPFLAGS += -DCURL_STATICLIB -DUNITTESTS