diff --git a/Modules/Debuggers/ProjectCenter/PCDebuggerViewDelegateProtocol.h b/Modules/Debuggers/ProjectCenter/PCDebuggerViewDelegateProtocol.h
index 5586eaf..f5114e1 100644
--- a/Modules/Debuggers/ProjectCenter/PCDebuggerViewDelegateProtocol.h
+++ b/Modules/Debuggers/ProjectCenter/PCDebuggerViewDelegateProtocol.h
@@ -20,12 +20,14 @@
 **  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
 
+#import <Foundation/NSObject.h>
+
 @class NSColor;
 @class NSTextView;
 @class NSArray;
 @class NSString;
 
-@protocol PCDebuggerViewDelegateProtocol
+@protocol PCDebuggerViewDelegateProtocol <NSObject>
 
 - (NSColor *)userInputColor;
 - (NSColor *)debuggerColor;