diff --git a/Common/OfficeFileFormatChecker2.cpp b/Common/OfficeFileFormatChecker2.cpp
index be48e7b0dc..3b2c94fd90 100644
--- a/Common/OfficeFileFormatChecker2.cpp
+++ b/Common/OfficeFileFormatChecker2.cpp
@@ -967,7 +967,7 @@ bool COfficeFileFormatChecker::isOfficeFile(const std::wstring &_fileName)
 		nFileType = AVS_OFFICESTUDIO_FILE_DOCUMENT_MHT;
 	else if (0 == sExt.compare(L".md"))
 		nFileType = AVS_OFFICESTUDIO_FILE_DOCUMENT_MD;
-	else if (0 == sExt.compare(L".csv") || 0 == sExt.compare(L".xls") || 0 == sExt.compare(L".xlsx") || 0 == sExt.compare(L".xlsb"))
+	else if (0 == sExt.compare(L".csv") || 0 == sExt.compare(L".tsv") || 0 == sExt.compare(L".xls") || 0 == sExt.compare(L".xlsx") || 0 == sExt.compare(L".xlsb"))
 		nFileType = AVS_OFFICESTUDIO_FILE_SPREADSHEET_CSV;
 	else if (0 == sExt.compare(L".html") || 0 == sExt.compare(L".htm"))
 		nFileType = AVS_OFFICESTUDIO_FILE_DOCUMENT_HTML;
diff --git a/X2tConverter/src/cextracttools.h b/X2tConverter/src/cextracttools.h
index a759dab285..908a50ce57 100644
--- a/X2tConverter/src/cextracttools.h
+++ b/X2tConverter/src/cextracttools.h
@@ -910,6 +910,10 @@ namespace NExtractTools
 
 			if (NULL != m_nCsvTxtEncoding)
 				nCsvEncoding = *m_nCsvTxtEncoding;
+			if(NSFile::GetFileExtention(*m_sFileFrom) == L"tsv")
+			{
+				cDelimiter = L"\t";
+			}
 			if (NULL != m_nCsvDelimiter)
 			{
 				switch (*m_nCsvDelimiter)