diff --git a/ResponsiveImages.html b/ResponsiveImages.html
index bd62e6b6..d97267f3 100644
--- a/ResponsiveImages.html
+++ b/ResponsiveImages.html
@@ -186,7 +186,7 @@ <h1>Algorithm for deriving the source image</h1>
 
 
 
-<p>A user agent may be able to override requests for higher-resolution images based on  user preferences. For example: “always request high-resolution images,” “always request low-resolution images,” and “request high-resolution images as bandwidth permits” based on the bandwidth information available to the browser.</p>
+<p>A user agent MAY  override requests for higher-resolution images based on  user preferences. For example: “always request high-resolution images,” “always request low-resolution images,” and “request high-resolution images as bandwidth permits” based on the bandwidth information available to the browser.</p>
 
     </section>
 <!-- /algorithms -->