diff --git a/scintilla/src/Document.cxx b/scintilla/src/Document.cxx
index 47d7c90eb..db93f7426 100644
--- a/scintilla/src/Document.cxx
+++ b/scintilla/src/Document.cxx
@@ -549,7 +549,7 @@ int Document::NextPosition(int pos, int moveDir) {
 				// See http://msdn.microsoft.com/en-us/library/cc194792%28v=MSDN.10%29.aspx
 				// http://msdn.microsoft.com/en-us/library/cc194790.aspx
 				if ((pos - 1) <= posStartLine) {
-					return posStartLine;
+					return posStartLine - 1;
 				} else if (IsDBCSLeadByte(cb.CharAt(pos - 1))) {
 					// Must actually be trail byte
 					return pos - 2;