diff --git a/g10/ChangeLog b/g10/ChangeLog
index 91d49b4ad..67b981387 100644
--- a/g10/ChangeLog
+++ b/g10/ChangeLog
@@ -1,3 +1,10 @@
+2011-06-13  Werner Koch  <wk@g10code.com>
+
+	* pkglue.c (mpi_from_sexp): Use GCRYMPI_FMT_USG to avoid problems
+	with leading zeroed.  The latest Libgcrypt does this now
+	correctly.  Given that the default of gcry_sexp_nth_mpi would use
+	a signed MPI, which is not implemented, the assertion would fail.
+
 2011-06-01  Marcus Brinkmann  <mb@g10code.com>
 
 	* parse-packet.c (parse_pubkeyenc): Change type of N to size_t.
diff --git a/g10/pkglue.c b/g10/pkglue.c
index 05f7167c2..3a078bd3f 100644
--- a/g10/pkglue.c
+++ b/g10/pkglue.c
@@ -40,7 +40,7 @@ mpi_from_sexp (gcry_sexp_t sexp, const char * item)
 
   list = gcry_sexp_find_token (sexp, item, 0);
   assert (list);
-  data = gcry_sexp_nth_mpi (list, 1, 0);
+  data = gcry_sexp_nth_mpi (list, 1, GCRYMPI_FMT_USG);
   assert (data);
   gcry_sexp_release (list);
   return data;