diff --git a/lib/krb5/appdefault.c b/lib/krb5/appdefault.c
index dab20d2c7..179af67ed 100644
--- a/lib/krb5/appdefault.c
+++ b/lib/krb5/appdefault.c
@@ -37,7 +37,7 @@ RCSID("$Id$");
 
 void
 krb5_appdefault_boolean(krb5_context context, const char *appname, 
-			krb5_realm realm, const char *option,
+			krb5_const_realm realm, const char *option,
 			krb5_boolean def_val, krb5_boolean *ret_val)
 {
     
@@ -79,7 +79,7 @@ krb5_appdefault_boolean(krb5_context context, const char *appname,
 
 void
 krb5_appdefault_string(krb5_context context, const char *appname, 
-		       krb5_realm realm, const char *option,
+		       krb5_const_realm realm, const char *option,
 		       const char *def_val, char **ret_val)
 {
     if(appname == NULL)
@@ -123,7 +123,7 @@ krb5_appdefault_string(krb5_context context, const char *appname,
 
 void
 krb5_appdefault_time(krb5_context context, const char *appname,
-		     krb5_realm realm, const char *option,
+		     krb5_const_realm realm, const char *option,
 		     time_t def_val, time_t *ret_val)
 {
     time_t t;