diff --git a/Documentation/pretty-formats.txt b/Documentation/pretty-formats.txt
index 293965524e81b2..afac703f21245b 100644
--- a/Documentation/pretty-formats.txt
+++ b/Documentation/pretty-formats.txt
@@ -131,7 +131,8 @@ The placeholders are:
 - '%B': raw body (unwrapped subject and body)
 - '%N': commit notes
 - '%GG': raw verification message from GPG for a signed commit
-- '%G?': show either "G" for Good or "B" for Bad for a signed commit
+- '%G?': show "G" for a Good signature, "B" for a Bad signature, "U" for a good,
+  untrusted signature and "N" for no signature
 - '%GS': show the name of the signer for a signed commit
 - '%GK': show the key used to sign a signed commit
 - '%gD': reflog selector, e.g., `refs/stash@{1}`
diff --git a/pretty.c b/pretty.c
index 35b592ad837b0e..d3a82d22d398ae 100644
--- a/pretty.c
+++ b/pretty.c
@@ -1145,6 +1145,8 @@ static size_t format_commit_one(struct strbuf *sb, const char *placeholder,
 			switch (c->signature_check.result) {
 			case 'G':
 			case 'B':
+			case 'U':
+			case 'N':
 				strbuf_addch(sb, c->signature_check.result);
 			}
 			break;