diff --git a/.changeset/itchy-carrots-fold.md b/.changeset/itchy-carrots-fold.md
new file mode 100644
index 0000000000..189b6e83d8
--- /dev/null
+++ b/.changeset/itchy-carrots-fold.md
@@ -0,0 +1,5 @@
+---
+"effect": patch
+---
+
+Actually fix Cause equality
diff --git a/packages/effect/src/internal/cause.ts b/packages/effect/src/internal/cause.ts
index 0600d94916..b7bc12babf 100644
--- a/packages/effect/src/internal/cause.ts
+++ b/packages/effect/src/internal/cause.ts
@@ -686,8 +686,7 @@ const evaluateCause = (
         break
       }
       case OpCodes.OP_FAIL: {
-        _parallel = HashSet.add(_parallel, cause._tag)
-        _parallel = HashSet.add(_parallel, cause.error)
+        _parallel = HashSet.add(_parallel, Chunk.make(cause._tag, cause.error))
         if (stack.length === 0) {
           return [_parallel, _sequential]
         }
@@ -695,8 +694,7 @@ const evaluateCause = (
         break
       }
       case OpCodes.OP_DIE: {
-        _parallel = HashSet.add(_parallel, cause._tag)
-        _parallel = HashSet.add(_parallel, cause.defect)
+        _parallel = HashSet.add(_parallel, Chunk.make(cause._tag, cause.defect))
         if (stack.length === 0) {
           return [_parallel, _sequential]
         }
@@ -704,8 +702,7 @@ const evaluateCause = (
         break
       }
       case OpCodes.OP_INTERRUPT: {
-        _parallel = HashSet.add(_parallel, cause._tag)
-        _parallel = HashSet.add(_parallel, cause.fiberId as unknown)
+        _parallel = HashSet.add(_parallel, Chunk.make(cause._tag, cause.fiberId as unknown))
         if (stack.length === 0) {
           return [_parallel, _sequential]
         }
diff --git a/packages/effect/test/Cause.test.ts b/packages/effect/test/Cause.test.ts
index e838f3ec6a..207ee5dc97 100644
--- a/packages/effect/test/Cause.test.ts
+++ b/packages/effect/test/Cause.test.ts
@@ -363,5 +363,11 @@ describe("Cause", () => {
 
   it("equals keep account for the failure type", () => {
     expect(Equal.equals(Cause.die(0), Cause.fail(0))).toBe(false)
+    expect(
+      Equal.equals(
+        Cause.parallel(Cause.fail("fail1"), Cause.die("fail2")),
+        Cause.parallel(Cause.fail("fail2"), Cause.die("fail1"))
+      )
+    ).toBe(false)
   })
 })