diff --git a/extra/assocs/lib/lib.factor b/extra/assocs/lib/lib.factor
index 5036a13d78..5f4620fd64 100755
--- a/extra/assocs/lib/lib.factor
+++ b/extra/assocs/lib/lib.factor
@@ -37,3 +37,10 @@ IN: assocs.lib
     H{ } clone [
         swap [ change-at ] 2curry assoc-each
     ] keep ; inline
+
+: if-at ( obj assoc quot1 quot2 -- )
+    [ dupd at* [ not -rot ? ] keep ] 2dip if ; inline
+
+: when-at ( obj assoc quot -- ) [ ] if-at ; inline
+
+: unless-at ( obj assoc quot -- ) [ ] swap if-at ; inline