diff --git a/ChocolArm64/Instruction/AInstEmitSimdHelper.cs b/ChocolArm64/Instruction/AInstEmitSimdHelper.cs
index fcfc2fe0ab..e416f7e4d7 100644
--- a/ChocolArm64/Instruction/AInstEmitSimdHelper.cs
+++ b/ChocolArm64/Instruction/AInstEmitSimdHelper.cs
@@ -1099,7 +1099,7 @@ namespace ChocolArm64.Instruction
         {
             int ESize = 8 << Size;
 
-            long TMaxValue =  (1L << (ESize - 1)) - 1;
+            long TMaxValue =  (1L << (ESize - 1)) - 1L;
             long TMinValue = -(1L << (ESize - 1));
 
             AILLabel LblFalse = new AILLabel();