diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/device.c b/bacnet-stack/ports/bdk-atxx4-mstp/device.c
index 73b2b653..93ab3385 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/device.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/device.c
@@ -615,7 +615,7 @@ bool Device_Write_Property(
             break;
         case 9600:
             if (value.tag == BACNET_APPLICATION_TAG_UNSIGNED_INT) {
-                if ((value.type.Unsigned_Int > 115200) &&
+                if ((value.type.Unsigned_Int <= 115200) &&
                     (rs485_baud_rate_set(value.type.Unsigned_Int))) {
                     status = true;
                 } else {