diff --git a/indra/llwindow/llopenglview-objc.mm b/indra/llwindow/llopenglview-objc.mm
index 7d258ac9a3..7440079192 100644
--- a/indra/llwindow/llopenglview-objc.mm
+++ b/indra/llwindow/llopenglview-objc.mm
@@ -203,13 +203,25 @@ attributedStringInfo getSegments(NSAttributedString *str)
 	
 	[glContext makeCurrentContext];
 	
+	// <FS:ND> setValues needs a real pointer, not some integer that is castet into one
+
+	// if (vsync)
+	// {
+	// 	[glContext setValues:(const GLint*)1 forParameter:NSOpenGLCPSwapInterval];
+	// } else {
+	// 	[glContext setValues:(const GLint*)0 forParameter:NSOpenGLCPSwapInterval];
+	// }
+
+	GLint glVsync = 0;
 	if (vsync)
 	{
-		[glContext setValues:(const GLint*)1 forParameter:NSOpenGLCPSwapInterval];
-	} else {
-		[glContext setValues:(const GLint*)0 forParameter:NSOpenGLCPSwapInterval];
+		glVsync = 1;
 	}
 	
+	[glContext setValues:&glVsync forParameter:NSOpenGLCPSwapInterval];
+
+	// </FS:ND>
+	
 	return self;
 }