diff --git a/src/main/java/com/jcraft/jsch/PageantConnector.java b/src/main/java/com/jcraft/jsch/PageantConnector.java
index 47a16a5e..621a08a9 100644
--- a/src/main/java/com/jcraft/jsch/PageantConnector.java
+++ b/src/main/java/com/jcraft/jsch/PageantConnector.java
@@ -88,7 +88,7 @@ private interface User32 extends com.sun.jna.platform.win32.User32 {
     long SendMessage(HWND hWnd, int msg, WPARAM num1, byte[] num2);
   }
 
-  private static class COPYDATASTRUCT32 extends Structure {
+  public static class COPYDATASTRUCT32 extends Structure {
     public int dwData;
     public int cbData;
     public Pointer lpData;
@@ -99,7 +99,7 @@ protected List<String> getFieldOrder() {
     }
   }
 
-  private static class COPYDATASTRUCT64 extends Structure {
+  public static class COPYDATASTRUCT64 extends Structure {
     public int dwData;
     public long cbData;
     public Pointer lpData;