diff --git a/public/irecipientfilter.h b/public/irecipientfilter.h
index 8e160790..ff680c74 100644
--- a/public/irecipientfilter.h
+++ b/public/irecipientfilter.h
@@ -25,7 +25,7 @@ public:
 	virtual int		GetRecipientCount( void ) const = 0;
 
 	// Client index will be -1 for invalid slot
-	virtual void	GetRecipientIndex( int &clientIndex, int slot ) const = 0;
+	virtual void	GetRecipientIndex( int *clientIndex, int slot ) const = 0;
 };
 
 #endif // IRECIPIENTFILTER_H