diff --git a/utf8.c b/utf8.c
index 550e785ecb..0c8e011a58 100644
--- a/utf8.c
+++ b/utf8.c
@@ -501,6 +501,13 @@ static const char *fallback_encoding(const char *name)
 	if (is_encoding_utf8(name))
 		return "UTF-8";
 
+	/*
+	 * Even though latin-1 is still seen in e-mail
+	 * headers, some platforms only install ISO-8859-1.
+	 */
+	if (!strcasecmp(name, "latin-1"))
+		return "ISO-8859-1";
+
 	return name;
 }