diff --git a/src/bacnet/basic/object/mso.c b/src/bacnet/basic/object/mso.c
index 53c135b9..99962e6c 100644
--- a/src/bacnet/basic/object/mso.c
+++ b/src/bacnet/basic/object/mso.c
@@ -289,7 +289,7 @@ static int Multistate_Output_Priority_Array_Encode(
             apdu_len = encode_application_null(apdu);
         } else {
             value = pObject->Priority_Array[priority];
-            apdu_len = encode_application_enumerated(apdu, value);
+            apdu_len = encode_application_unsigned(apdu, value);
         }
     }