diff --git a/lib/krb5/principal.c b/lib/krb5/principal.c
index 30278769d..fe7ab440e 100644
--- a/lib/krb5/principal.c
+++ b/lib/krb5/principal.c
@@ -833,6 +833,8 @@ krb5_principal_match(krb5_context context,
     return TRUE;
 }
 
+#if defined(KRB4) || !defined(HEIMDAL_SMALLER)
+
 static struct v4_name_convert {
     const char *from;
     const char *to;
@@ -846,6 +848,8 @@ static struct v4_name_convert {
     { NULL, NULL }
 };
 
+#endif
+
 #ifdef KRB4
 
 /*