diff --git a/src/preferences/screen/MonitorView.cpp b/src/preferences/screen/MonitorView.cpp
index 416f7eb209..08a9c3063e 100644
--- a/src/preferences/screen/MonitorView.cpp
+++ b/src/preferences/screen/MonitorView.cpp
@@ -132,16 +132,6 @@ MonitorView::SetResolution(int32 width, int32 height)
 }
 
 
-#ifdef HAIKU_TARGET_PLATFORM_BEOS
-// r5 doesn't have this one
-bool
-operator!=(const rgb_color &a, const rgb_color &b)
-{
-	return a.red != b.red || a.green != b.green || a.blue != b.blue;
-}
-#endif
-
-
 void
 MonitorView::MessageReceived(BMessage* message)
 {