diff --git a/lib/krb5/asn1_glue.c b/lib/krb5/asn1_glue.c
index 48b739190..2c84abbb2 100644
--- a/lib/krb5/asn1_glue.c
+++ b/lib/krb5/asn1_glue.c
@@ -40,16 +40,16 @@
 RCSID("$Id$");
 
 krb5_error_code KRB5_LIB_FUNCTION
-krb5_principal2principalname (PrincipalName *p,
-			      const krb5_principal from)
+_krb5_principal2principalname (PrincipalName *p,
+			       const krb5_principal from)
 {
     return copy_PrincipalName(&from->name, p);
 }
 
 krb5_error_code KRB5_LIB_FUNCTION
-principalname2krb5_principal (krb5_principal *principal,
-			      const PrincipalName from,
-			      const Realm realm)
+_krb5_principalname2krb5_principal (krb5_principal *principal,
+				    const PrincipalName from,
+				    const Realm realm)
 {
     krb5_principal p = malloc(sizeof(*p));
     copy_PrincipalName(&from, &p->name);