diff --git a/src/system/kernel/device_manager/IORequest.cpp b/src/system/kernel/device_manager/IORequest.cpp
index 75d807fae2..e686465d18 100644
--- a/src/system/kernel/device_manager/IORequest.cpp
+++ b/src/system/kernel/device_manager/IORequest.cpp
@@ -280,7 +280,6 @@ IOOperation::Finish()
 
 				// The vector extends beyond the end offset -- cut it.
 				length = endOffset - offset;
-				length -= offset + length - endOffset;
 			}
 
 			if (base >= bounceBufferStart && base < bounceBufferEnd) {