diff --git a/scripts/spt25.gd b/scripts/spt25.gd
index cde3c4a2..f9c492b3 100644
--- a/scripts/spt25.gd
+++ b/scripts/spt25.gd
@@ -28,5 +28,6 @@ class SPT25 extends unit.Unit:
     func process(delta: float):
         tick += delta
         if (tick - tx_tick) > req_period:
+            tx_tick = tick
             return Error.OK
         return Error.ERR_BUSY