diff --git a/akka-actor/src/main/scala-2.13-/akka/util/ByteString.scala b/akka-actor/src/main/scala-2.13-/akka/util/ByteString.scala
index 3ce187fd07..82a3885592 100644
--- a/akka-actor/src/main/scala-2.13-/akka/util/ByteString.scala
+++ b/akka-actor/src/main/scala-2.13-/akka/util/ByteString.scala
@@ -373,7 +373,7 @@ object ByteString {
         val dst = Base64.getDecoder.decode(ByteBuffer.wrap(bytes, startIndex, length))
         if (dst.hasArray) {
           if (dst.array.length == dst.remaining) ByteString1C(dst.array)
-          else ByteString1(dst.array, dst.arrayOffset + dst.position, dst.remaining)
+          else ByteString1(dst.array, dst.arrayOffset + dst.position(), dst.remaining)
         } else CompactByteString(dst)
       }
 
@@ -384,7 +384,7 @@ object ByteString {
         val dst = Base64.getEncoder.encode(ByteBuffer.wrap(bytes, startIndex, length))
         if (dst.hasArray) {
           if (dst.array.length == dst.remaining) ByteString1C(dst.array)
-          else ByteString1(dst.array, dst.arrayOffset + dst.position, dst.remaining)
+          else ByteString1(dst.array, dst.arrayOffset + dst.position(), dst.remaining)
         } else CompactByteString(dst)
       }