diff --git a/Source/Meadow.Foundation.Peripherals/ICs.IOExpanders.Pcx857x/Driver/Drivers/Extras/Pcx8574.cs b/Source/Meadow.Foundation.Peripherals/ICs.IOExpanders.Pcx857x/Driver/Drivers/Extras/Pcx8574.cs
index 480249e8f3..0329dcdf2c 100644
--- a/Source/Meadow.Foundation.Peripherals/ICs.IOExpanders.Pcx857x/Driver/Drivers/Extras/Pcx8574.cs
+++ b/Source/Meadow.Foundation.Peripherals/ICs.IOExpanders.Pcx857x/Driver/Drivers/Extras/Pcx8574.cs
@@ -158,7 +158,7 @@ protected byte ReadState8()
         {
             Span<byte> buffer = stackalloc byte[1];
             i2cComms.Read(buffer);
-            return buffer[1];
+            return buffer[0];
         }
 
         /// <summary>