diff --git a/scsh/scsh-interfaces.scm b/scsh/scsh-interfaces.scm
index b73d4d1..7eaf64a 100644
--- a/scsh/scsh-interfaces.scm
+++ b/scsh/scsh-interfaces.scm
@@ -1082,8 +1082,8 @@
 	  full-interrupt-set))
 
 (define-interface dot-locking-interface
-  (export obtain-dot-lock
-	  release-dot-lock
+  (export obtain-dot-lock release-dot-lock
+	  break-dot-lock
 	  (with-dot-lock :syntax)
 	  with-dot-lock*))