diff --git a/Source/Tst/Shared/KZDev.PerfUtils.MemoryStreamSlim.Tests.Shared/UsingMemoryStreamSlim.ReadWrite.cs b/Source/Tst/Shared/KZDev.PerfUtils.MemoryStreamSlim.Tests.Shared/UsingMemoryStreamSlim.ReadWrite.cs
index 2e15069..87e5065 100644
--- a/Source/Tst/Shared/KZDev.PerfUtils.MemoryStreamSlim.Tests.Shared/UsingMemoryStreamSlim.ReadWrite.cs
+++ b/Source/Tst/Shared/KZDev.PerfUtils.MemoryStreamSlim.Tests.Shared/UsingMemoryStreamSlim.ReadWrite.cs
@@ -1131,7 +1131,7 @@ void WriteByteDataToStream (MemoryStreamSlim stream, byte[] dataCopyArray, ref i
 
             void PositionStream (MemoryStreamSlim stream, int maxPosition, out int dataCopyArrayPosition)
             {
-                int newPosition = RandomSource.GetRandomInteger(maxPosition);
+                int newPosition = (0 == maxPosition) ? 0 : RandomSource.GetRandomInteger(maxPosition);
                 stream.Position = dataCopyArrayPosition = newPosition;
             }