diff --git a/mirai-core-api/src/jvmBaseMain/kotlin/utils/AbstractExternalResource.kt b/mirai-core-api/src/jvmBaseMain/kotlin/utils/AbstractExternalResource.kt
index 56ae39572..6bdabd3ba 100644
--- a/mirai-core-api/src/jvmBaseMain/kotlin/utils/AbstractExternalResource.kt
+++ b/mirai-core-api/src/jvmBaseMain/kotlin/utils/AbstractExternalResource.kt
@@ -9,7 +9,9 @@
 
 package net.mamoe.mirai.utils
 
+import io.ktor.utils.io.core.*
 import io.ktor.utils.io.errors.*
+import io.ktor.utils.io.streams.*
 import kotlinx.atomicfu.atomic
 import kotlinx.coroutines.CompletableDeferred
 import kotlinx.coroutines.Deferred
@@ -254,4 +256,9 @@ public constructor(
     final override fun close() {
         holder.close()
     }
+
+    @MiraiExperimentalApi
+    override fun input(): Input {
+        return inputStream().asInput()
+    }
 }
\ No newline at end of file