diff --git a/lib/gssapi/gssapi/gssapi.h b/lib/gssapi/gssapi/gssapi.h
index d077c8b73..9f1386e55 100644
--- a/lib/gssapi/gssapi/gssapi.h
+++ b/lib/gssapi/gssapi/gssapi.h
@@ -762,13 +762,13 @@ GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_duplicate_name (
 
 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_duplicate_oid (
 	    OM_uint32 * /* minor_status */,
-	    gss_OID /* src_oid */,
+	    gss_const_OID /* src_oid */,
 	    gss_OID * /* dest_oid */
            );
 
 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_duplicate_oid_set (
 	    OM_uint32 * /* minor_status */,
-	    gss_OID_set /* src_oid */,
+	    gss_const_OID_set /* src_oid */,
 	    gss_OID_set * /* dest_oid */
            );
 
diff --git a/lib/gssapi/mech/gss_duplicate_oid.c b/lib/gssapi/mech/gss_duplicate_oid.c
index 29a9cf862..f757fb500 100644
--- a/lib/gssapi/mech/gss_duplicate_oid.c
+++ b/lib/gssapi/mech/gss_duplicate_oid.c
@@ -36,7 +36,7 @@
 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 gss_duplicate_oid (
         OM_uint32 *minor_status,
-	gss_OID src_oid,
+	gss_const_OID src_oid,
 	gss_OID *dest_oid
      )
 {
diff --git a/lib/gssapi/mech/gss_duplicate_oid_set.c b/lib/gssapi/mech/gss_duplicate_oid_set.c
index ae0ab8d08..1fc79117b 100644
--- a/lib/gssapi/mech/gss_duplicate_oid_set.c
+++ b/lib/gssapi/mech/gss_duplicate_oid_set.c
@@ -35,7 +35,7 @@
 
 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
 gss_duplicate_oid_set(OM_uint32 *minor_status,
-                      gss_OID_set src_oid_set,
+                      gss_const_OID_set src_oid_set,
                       gss_OID_set *dest_oid_set)
 {
     OM_uint32 major_status, junk;