diff --git a/ftk/src/ftksys.h b/ftk/src/ftksys.h
index 29c4e97..732196c 100644
--- a/ftk/src/ftksys.h
+++ b/ftk/src/ftksys.h
@@ -830,7 +830,6 @@
 			FLMUINT64			ui64WriteOffset,
 			FLMUINT				uiBytesToWrite,
 			const void *		pvBuffer,
-			FLMUINT				uiBufferSize,
 			IF_IOBuffer *		pBufferObj,
 			FLMUINT *			puiBytesWrittenRV,
 			FLMBOOL				bBuffHasFullSectors,
diff --git a/ftk/src/ftkunix.cpp b/ftk/src/ftkunix.cpp
index 546b664..7be3815 100644
--- a/ftk/src/ftkunix.cpp
+++ b/ftk/src/ftkunix.cpp
@@ -929,7 +929,7 @@ RCODE FLMAPI F_FileHdl::write(
 	if( m_bDoDirectIO)
 	{
 		rc = directWrite( ui64WriteOffset, uiBytesToWrite, pvBuffer, 
-			uiBytesToWrite, NULL, puiBytesWrittenRV, FALSE, TRUE);
+			NULL, puiBytesWrittenRV, FALSE, TRUE);
 		goto Exit;
 	}
 	
@@ -1205,8 +1205,6 @@ RCODE F_FileHdl::directWrite(
 			break;
 		}
 
-		f_assert( !pBufferObj);
-
 		pucSrcBuffer += uiBytesBeingOutput;
 		ui64WriteOffset += uiBytesBeingOutput;
 	}