diff --git a/extra/tools/annotations/annotations.factor b/extra/tools/annotations/annotations.factor
index d24d60cef6..e97f292416 100644
--- a/extra/tools/annotations/annotations.factor
+++ b/extra/tools/annotations/annotations.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2005, 2007 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel words parser io inspector quotations sequences
-prettyprint continuations ;
+prettyprint continuations effects ;
 IN: tools.annotations
 
 : annotate ( word quot -- )
@@ -9,17 +9,29 @@ IN: tools.annotations
     swap define-compound do-parse-hook ;
     inline
 
-: entering ( str -- ) "! Entering: " write print .s flush ;
+: entering ( str -- )
+    "/-- Entering: " write dup .
+    stack-effect [
+        >r datastack r> effect-in length tail* stack.
+    ] [
+        .s
+    ] if* "\\--" print flush ;
 
-: leaving ( str -- ) "! Leaving: " write print .s flush ;
+: leaving ( str -- )
+    "/-- Leaving: " write dup .
+    stack-effect [
+        >r datastack r> effect-out length tail* stack.
+    ] [
+        .s
+    ] if* "\\--" print flush ;
 
-: (watch) ( str def -- def )
+: (watch) ( word def -- def )
     over [ entering ] curry
     rot [ leaving ] curry
     swapd 3append ;
 
 : watch ( word -- )
-    dup word-name swap [ (watch) ] annotate ;
+    dup [ (watch) ] annotate ;
 
 : breakpoint ( word -- )
     [ \ break add* ] annotate ;