diff --git a/.changeset/chilled-toys-share.md b/.changeset/chilled-toys-share.md
index c039b7f8a1..4fe8124432 100644
--- a/.changeset/chilled-toys-share.md
+++ b/.changeset/chilled-toys-share.md
@@ -1,5 +1,5 @@
 ---
-"effect": minor
+"effect": patch
 ---
 
 add `Micro.isMicroCause` guard
diff --git a/packages/effect/src/Micro.ts b/packages/effect/src/Micro.ts
index 861c41cd90..74b84e95e6 100644
--- a/packages/effect/src/Micro.ts
+++ b/packages/effect/src/Micro.ts
@@ -172,11 +172,11 @@ export type MicroCauseTypeId = typeof MicroCauseTypeId
 export type MicroCause<E> = MicroCause.Die | MicroCause.Fail<E> | MicroCause.Interrupt
 
 /**
- * @since 3.7.0
+ * @since 3.6.6
  * @experimental
  * @category guards
  */
-export const isMicroCause = <E>(self: unknown): self is MicroCause<E> => hasProperty(self, MicroCauseTypeId)
+export const isMicroCause = (self: unknown): self is MicroCause<unknown> => hasProperty(self, MicroCauseTypeId)
 
 /**
  * @since 3.4.6