diff --git a/stspin/constants/constant.py b/stspin/constants/constant.py
index c8e3773..fa9b468 100644
--- a/stspin/constants/constant.py
+++ b/stspin/constants/constant.py
@@ -2,7 +2,6 @@
     Final,
 )
 
-
 class Constant:
     DirReverse: Final           = 0
     DirForward: Final           = 1
@@ -12,7 +11,7 @@ class Constant:
     ActSetMark: Final           = (1 << 3)
 
     MaxStepsPerSecond: Final[float]     = 15625.0
-    MaxSteps: Final                     = int(2 ** 22)
+    MaxSteps: Final                     = int(2 ** 22) - 1
 
     TickSeconds: Final[float]           = 250 * (10 ** -9)
     SpsToSpeed: Final[float]            = TickSeconds / (2 ** -28)