diff --git a/gnupg-2.2.20-file-is-digest.patch b/gnupg-2.2.20-file-is-digest.patch
index c2bf7c3..3ba9113 100644
--- a/gnupg-2.2.20-file-is-digest.patch
+++ b/gnupg-2.2.20-file-is-digest.patch
@@ -155,7 +155,7 @@ diff -up gnupg-2.2.20/g10/sign.c.file-is-digest gnupg-2.2.20/g10/sign.c
  	}
 +      else if (opt.file_is_digest)
 +        {
-+          byte *mdb, ts[5];
++          byte *mdb, ts[5] = {0};
 +          size_t mdlen;
 +          const char *fp;
 +          int c, d;
@@ -165,7 +165,7 @@ diff -up gnupg-2.2.20/g10/sign.c.file-is-digest gnupg-2.2.20/g10/sign.c
 +          mdb = gcry_md_read(mfx.md, opt.def_digest_algo);
 +          mdlen = gcry_md_get_algo_dlen(opt.def_digest_algo);
 +          if (strlen(fname) != mdlen * 2 + 11)
-+            log_bug("digests must be %zu + @ + 5 bytes\n", mdlen);
++            log_bug("digests must be %zu + '@' + 5 bytes\n", mdlen);
 +          d = -1;
 +          for (fp = fname ; *fp; )
 +            {