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-rw-r--r--doc/debugging.texi5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/debugging.texi b/doc/debugging.texi
index fb27b2710..242d601cb 100644
--- a/doc/debugging.texi
+++ b/doc/debugging.texi
@@ -182,7 +182,12 @@ such a certificate. You may use the @code{relax} flag in
fingerprint and this flag may only be added manually to
@file{trustlist.txt}.
+@item Error message: ``digest algorithm N has not been enabled''
+The signature is broken. You may try the option
+@option{--extra-digest-algo SHA256} to workaround the problem. The
+number N is the internal algorighm indentifier; for example 8 refers to
+SHA-256.
@end itemize