diff --git a/core/src/main/java/hudson/util/jna/Advapi32.java b/core/src/main/java/hudson/util/jna/Advapi32.java
index 96962a3ca98bd189da661fc011b710d98ab3aea9..1937a234185e2e9257ef64ac6d6e2c973e9140c9 100644
--- a/core/src/main/java/hudson/util/jna/Advapi32.java
+++ b/core/src/main/java/hudson/util/jna/Advapi32.java
@@ -30,6 +30,14 @@ import com.sun.jna.ptr.IntByReference;
 public interface Advapi32  extends StdCallLibrary {
   Advapi32 INSTANCE = (Advapi32) Native.loadLibrary("Advapi32", Advapi32.class, Options.UNICODE_OPTIONS);
 
+    /**
+     * Retrieves the name of the user associated with the current thread.
+     *
+     * <p>
+     * See http://msdn.microsoft.com/en-us/library/ms724432(VS.85).aspx
+     */
+    boolean GetUserName(char[] buffer, IntByReference lpnSize);
+
 /*
 BOOL WINAPI LookupAccountName(
   LPCTSTR lpSystemName,