diff --git a/pcsx2/DEV9/ATA/ATA_Transfer.cpp b/pcsx2/DEV9/ATA/ATA_Transfer.cpp
index 1a69cb6b85..0e7832fd5b 100644
--- a/pcsx2/DEV9/ATA/ATA_Transfer.cpp
+++ b/pcsx2/DEV9/ATA/ATA_Transfer.cpp
@@ -105,7 +105,7 @@ bool ATA::IO_Write()
 		{
 			IO_SparseCacheUpdateLocation(imagePos + written);
 			// Align to sparse block size.
-			u32 writeSize = hddSparseBlockSize - ((imagePos + written) % hddSparseBlockSize);
+			u32 writeSize = static_cast<u32>(hddSparseBlockSize - ((imagePos + written) % hddSparseBlockSize));
 			// Limit to size of write.
 			writeSize = std::min(writeSize, entry.length - written);