diff --git a/lce/src/main/java/com/laimiux/lce/Convert.kt b/lce/src/main/java/com/laimiux/lce/Convert.kt
index 5f70248..aef3992 100644
--- a/lce/src/main/java/com/laimiux/lce/Convert.kt
+++ b/lce/src/main/java/com/laimiux/lce/Convert.kt
@@ -1,3 +1,5 @@
+@file:Suppress("unused")
+
 package com.laimiux.lce
 
 /**
@@ -258,6 +260,18 @@ fun <C> UCT<C>.asCE(): CE<C, Throwable>? {
     )
 }
 
+/**
+ * Converts [UCT] to a [UCE] by [mapping][map] the error state to [E].
+ */
+fun <C, E> UCT<C>.asUCE(map: (throwable: Throwable) -> E): UCE<C, E> {
+    return foldTypes(
+        onLoading = { it },
+        onContent = { it },
+        onError = { UCE.error(map(it.value)) }
+    )
+}
+
+
 /**
  * Converts [UCT] to a [CE] by [mapping][map] the loading state to [CE].
  */