diff --git a/lib/krb5/principal.c b/lib/krb5/principal.c
index 319a58e52..5cb3b9652 100644
--- a/lib/krb5/principal.c
+++ b/lib/krb5/principal.c
@@ -1219,7 +1219,7 @@ krb5_sname_to_principal (krb5_context context,
     return ret;
 }
 
-struct {
+static const struct {
     const char *type;
     int32_t value;
 } nametypes[] = {