diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5aeafc..bfa1b68 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@
 ### New in `sym`
 
 - Mathematical symbols
+  - `emptyset.alt`: ∅︀
+  - `nothing.alt`: ∅︀
   - `gt.double.nested`: ⪢
   - `lt.double.nested`: ⪡
   - `gt.arc` ⪧
diff --git a/src/modules/sym.txt b/src/modules/sym.txt
index eb79e8a..ef8a474 100644
--- a/src/modules/sym.txt
+++ b/src/modules/sym.txt
@@ -401,12 +401,14 @@ asymp ≍
 
 // Set theory.
 emptyset ∅
+  .alt ∅\vs{1}
   .arrow.r ⦳
   .arrow.l ⦴
   .bar ⦱
   .circle ⦲
   .rev ⦰
 nothing ∅
+  .alt ∅\vs{1}
   .arrow.r ⦳
   .arrow.l ⦴
   .bar ⦱