diff --git a/docs/changes.txt b/docs/changes.txt
index 7778da28d2..a5b9f504f3 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -95,6 +95,7 @@ All:
 
 - Fixed bug with parsing some dates in wxDateTime (Bob Pesner).
 - Fixed bug with parsing negative time zones in wxDateTime::ParseRfc822Date().
+- Initialize current line in wxTextBuffer ctor (Suzuki Masahiro).
 
 All (GUI):
 
diff --git a/include/wx/textbuf.h b/include/wx/textbuf.h
index f768a56324..569b1ac9e9 100644
--- a/include/wx/textbuf.h
+++ b/include/wx/textbuf.h
@@ -172,7 +172,7 @@ protected:
     // -----
 
     // default ctor, use Open(string)
-    wxTextBuffer() { m_isOpened = false; }
+    wxTextBuffer() { m_nCurLine = 0; m_isOpened = false; }
 
     // ctor from filename
     wxTextBuffer(const wxString& strBufferName);