diff --git a/hw/xquartz/X11Application.m b/hw/xquartz/X11Application.m
index b686b0090..31083996e 100644
--- a/hw/xquartz/X11Application.m
+++ b/hw/xquartz/X11Application.m
@@ -1593,6 +1593,11 @@ handle_mouse:
 
     case NSScrollWheel:
     {
+#if MAC_OS_X_VERSION_MAX_ALLOWED < 1050
+        float deltaX = [e deltaX];
+        float deltaY = [e deltaY];
+        BOOL isContinuous = NO;
+#else
         CGFloat deltaX = [e deltaX];
         CGFloat deltaY = [e deltaY];
         CGEventRef cge = [e CGEvent];
@@ -1614,6 +1619,7 @@ handle_mouse:
             deltaY *= lineHeight / 5.0;
         }
 #endif
+#endif
         
 #if !defined(XPLUGIN_VERSION) || XPLUGIN_VERSION == 0
         /* If we're in the background, we need to send a MotionNotify event