diff --git a/shared/nm-glib-aux/nm-shared-utils.c b/shared/nm-glib-aux/nm-shared-utils.c
index e7dbaa8a8..78496c315 100644
--- a/shared/nm-glib-aux/nm-shared-utils.c
+++ b/shared/nm-glib-aux/nm-shared-utils.c
@@ -1381,6 +1381,15 @@ nm_strcmp0_p_with_data (gconstpointer a, gconstpointer b, gpointer user_data)
 	return nm_strcmp0 (s1, s2);
 }
 
+int
+nm_strcmp_ascii_case_with_data (gconstpointer a, gconstpointer b, gpointer user_data)
+{
+	const char *s1 = a;
+	const char *s2 = b;
+
+	return g_ascii_strcasecmp (s1, s2);
+}
+
 int
 nm_cmp_uint32_p_with_data (gconstpointer p_a, gconstpointer p_b, gpointer user_data)
 {
diff --git a/shared/nm-glib-aux/nm-shared-utils.h b/shared/nm-glib-aux/nm-shared-utils.h
index 7d7ed16fe..17884a356 100644
--- a/shared/nm-glib-aux/nm-shared-utils.h
+++ b/shared/nm-glib-aux/nm-shared-utils.h
@@ -1427,6 +1427,7 @@ nm_utf8_collate0 (const char *a, const char *b)
 int nm_strcmp_with_data (gconstpointer a, gconstpointer b, gpointer user_data);
 int nm_strcmp_p_with_data (gconstpointer a, gconstpointer b, gpointer user_data);
 int nm_strcmp0_p_with_data (gconstpointer a, gconstpointer b, gpointer user_data);
+int nm_strcmp_ascii_case_with_data (gconstpointer a, gconstpointer b, gpointer user_data);
 int nm_cmp_uint32_p_with_data (gconstpointer p_a, gconstpointer p_b, gpointer user_data);
 int nm_cmp_int2ptr_p_with_data (gconstpointer p_a, gconstpointer p_b, gpointer user_data);