diff --git a/include/wx/textbuf.h b/include/wx/textbuf.h
index 8da8b29454..f6ca9dcfb9 100644
--- a/include/wx/textbuf.h
+++ b/include/wx/textbuf.h
@@ -157,7 +157,7 @@ public:
     }
 
     // remove all lines
-    void Clear() { m_aLines.clear(); m_nCurLine = 0; }
+    void Clear() { m_aLines.clear(); m_aTypes.clear(); m_nCurLine = 0; }
 
     // change the buffer (default argument means "don't change type")
     // possibly in another format