diff --git a/src/libnm-glib-aux/nm-uuid.c b/src/libnm-glib-aux/nm-uuid.c
index 979f91ea9f..d7ba706e2f 100644
--- a/src/libnm-glib-aux/nm-uuid.c
+++ b/src/libnm-glib-aux/nm-uuid.c
@@ -467,7 +467,7 @@ nm_uuid_generate_from_strings_strv(NMUuidType         uuid_type,
                                    const NMUuid      *type_args,
                                    const char *const *strv)
 {
-    nm_auto_str_buf NMStrBuf str = NM_STR_BUF_INIT_A(NM_UTILS_GET_NEXT_REALLOC_SIZE_232, FALSE);
+    nm_auto_str_buf NMStrBuf str = NM_STR_BUF_INIT_A(NM_UTILS_GET_NEXT_REALLOC_SIZE_232, TRUE);
     gsize                    slen;
     const char              *s;