diff --git a/lisp/ox-texinfo.el b/lisp/ox-texinfo.el
index e01ee5a9a..f7bc134a1 100644
--- a/lisp/ox-texinfo.el
+++ b/lisp/ox-texinfo.el
@@ -1368,7 +1368,7 @@ as a communication channel."
 	(type (org-element-property :type special-block)))
     (format "@%s%s\n%s@end %s"
 	    type
-	    (if opt (concat " " opt) opt)
+	    (if opt (concat " " opt) "")
 	    (or contents "")
 	    type)))