diff --git a/shared/nm-glib-aux/nm-hash-utils.h b/shared/nm-glib-aux/nm-hash-utils.h
index f13e0b6d56..aa0a3d7c0a 100644
--- a/shared/nm-glib-aux/nm-hash-utils.h
+++ b/shared/nm-glib-aux/nm-hash-utils.h
@@ -26,6 +26,9 @@
 
 /*****************************************************************************/
 
+#define NM_HASH_SEED_16(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, aa, ab, ac, ad, ae, af) \
+	((const guint8[16]) { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, aa, ab, ac, ad, ae, af })
+
 void nm_hash_siphash42_init (CSipHash *h, guint static_seed);
 
 /* Siphash24 of binary buffer @arr and @len, using the randomized seed from