diff --git a/ChangeLog b/ChangeLog
index 992ceac9e..55fbcb3f8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,7 @@
 	the extra copies AppCopy1 AppCoppy2 etc.
 	* Source/NSWorkspace.m: Use advertised port name for the app name so
 	that other apps can contact it.
+	Implement ([-extendPowerOffBy:]) to ask workspace application.
 	* Tools/gclose.m: Triavial utility ... counterpart for gopen ...
 	close doen an application.
 	* Tools/GNUmakefile: build gclose
diff --git a/Source/NSWorkspace.m b/Source/NSWorkspace.m
index 85e177583..965d1f7d2 100644
--- a/Source/NSWorkspace.m
+++ b/Source/NSWorkspace.m
@@ -1395,12 +1395,25 @@ inFileViewerRootedAtPath: (NSString*)rootFullpath
 }
 
 /*
- * Requesting Additional Time before Power Off or Logout
+ * Requesting Additional Time before Power Off or Logout<br />
+ * Returns the amount of time actually granted (which may be less than
+ * requested).<br />
+ * Times are measured in milliseconds.
  */
 - (int) extendPowerOffBy: (int)requested
 {
-  // FIXME
-  return 0;
+  int	result = 0;
+  id	app = [self _workspaceApplication];
+
+  if (app != nil)
+    {
+      NS_DURING
+	result = [app extendPowerOffBy: requested];
+      NS_HANDLER
+	result = 0;
+      NS_ENDHANDLER
+    }
+  return result;
 }
 
 @end