diff --git a/src/support/docstream.cpp b/src/support/docstream.cpp
index 682aa64d54..ed00fffa0e 100644
--- a/src/support/docstream.cpp
+++ b/src/support/docstream.cpp
@@ -260,7 +260,7 @@ protected:
 		else if (encoding_ == "EUC-JP")
 			return 3;
 		else if (encoding_ == "ISO-2022-JP")
-			return 5;
+			return 8;
 		else if (encoding_ == "BIG5" ||
 			 encoding_ == "EUC-KR" ||
 			 encoding_ == "EUC-CN" ||