diff --git a/Headers/gnustep/base/NSPort.h b/Headers/gnustep/base/NSPort.h
index fb73eb63e..1d4a92492 100644
--- a/Headers/gnustep/base/NSPort.h
+++ b/Headers/gnustep/base/NSPort.h
@@ -26,7 +26,7 @@
 
 #include	<Foundation/NSObject.h>
 
-@class	NSArray;
+@class	NSMutableArray;
 @class	NSConnection;
 @class	NSDate;
 @class	NSRunLoop;