diff --git a/src/treesit.c b/src/treesit.c
index a41892b1cac..218cb7407a8 100644
--- a/src/treesit.c
+++ b/src/treesit.c
@@ -1467,7 +1467,8 @@ an indirect buffer.  */)
       {
 	struct Lisp_TS_Parser *parser = XTS_PARSER (XCAR (tail));
 	if (EQ (parser->tag, tag)
-	    && EQ (parser->language_symbol, language))
+	    && EQ (parser->language_symbol, language)
+	    && EQ (parser->buffer, buf_orig))
 	  return XCAR (tail);
       }
     }