diff --git a/unix/common/unixcommon.h b/unix/common/unixcommon.h
index 66fe84c..5f5c8d6 100644
--- a/unix/common/unixcommon.h
+++ b/unix/common/unixcommon.h
@@ -30,10 +30,9 @@
 
 typedef std::map<unsigned int, rdr::U32> OutputIdMap;
 
-rfb::ScreenSet computeScreenLayout(int screenIndex, OutputIdMap *outputIdMap);
+rfb::ScreenSet computeScreenLayout(OutputIdMap *outputIdMap);
 
-unsigned int setScreenLayout(int screenIndex,
-                             int fb_width, int fb_height, const rfb::ScreenSet& layout,
+unsigned int setScreenLayout(int fb_width, int fb_height, const rfb::ScreenSet& layout,
                              OutputIdMap *outputIdMap);