diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index cf4853b7d..0519797a1 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -577,7 +577,21 @@ static void do_timer(CFRunLoopTimerRef timer, void* data)
 	      contentRect:(NSRect)rect 
 		styleMask:(NSUInteger)windowStyle 
 {
-  self = [super initWithContentRect:rect styleMask:windowStyle backing:NSBackingStoreBuffered defer:NO];
+  NSScreen *gd = nil; // gd will point to the screen containing the bottom-left of rect
+  NSArray *a = [NSScreen screens]; 
+  for(NSUInteger i = 0; i < [a count]; i++) {
+    NSRect r = [[a objectAtIndex:i] frame];
+    if (rect.origin.x >= r.origin.x && rect.origin.x <= r.origin.x + r.size.width
+        && rect.origin.y >= r.origin.y && rect.origin.y <= r.origin.y + r.size.height) {
+      gd = [a objectAtIndex:i];
+      rect.origin.x -= r.origin.x; // express rect relatively to gd's origin
+      rect.origin.y -= r.origin.y;
+      break;
+      }
+  }
+  // attempt to create the window on screen gd
+  self = [super initWithContentRect:rect styleMask:windowStyle backing:NSBackingStoreBuffered defer:NO
+	  screen:gd];
   if (self) {
     w = flw;
     containsGLsubwindow = NO;