diff --git a/compile/persist/src/main/scala/sbt/inc/Base64.scala b/compile/persist/src/main/scala/sbt/inc/Base64.scala
index 21001a2a4..19458a5f6 100644
--- a/compile/persist/src/main/scala/sbt/inc/Base64.scala
+++ b/compile/persist/src/main/scala/sbt/inc/Base64.scala
@@ -34,7 +34,7 @@ private[sbt] object Java89Encoder {
 
   private val Base64_class = Class.forName("java.util.Base64")
   private val Base64_getEncoder = ensureAccessible(Base64_class.getMethod("getEncoder"))
-  private val Base64_getDecoder = ensureAccessible(Base64_class.getMethod("getEncoder"))
+  private val Base64_getDecoder = ensureAccessible(Base64_class.getMethod("getDecoder"))
   private val Base64_Encoder_class = Class.forName("java.util.Base64$Encoder")
   private val Base64_Decoder_class = Class.forName("java.util.Base64$Decoder")
   private val Base64_Encoder_encodeToString = ensureAccessible(Base64_Encoder_class.getMethod("encodeToString", classOf[Array[Byte]]))
@@ -58,4 +58,4 @@ private[sbt] class Java89Encoder extends Base64 {
   } catch {
     case ex: InvocationTargetException => throw ex.getCause
   }
-}
\ No newline at end of file
+}