diff -u b/core/modules/image/image.module b/core/modules/image/image.module
--- b/core/modules/image/image.module
+++ b/core/modules/image/image.module
@@ -153,8 +153,8 @@
       // HTML 4 and XHTML 1.0 always require an alt attribute. The HTML 5 draft
       // allows the alt attribute to be omitted in some cases. Therefore,
       // default the alt attribute to an empty string, but allow code calling
-      // theme('image') to pass explicit NULL for it to be omitted. Usually,
-      // neither omission nor an empty string satisfies accessibility
+      // theme('image_style') to pass explicit NULL for it to be omitted.
+      //  Usually, neither omission nor an empty string satisfies accessibility
       // requirements, so it is strongly encouraged for code calling
       // theme('image_style') to pass a meaningful value for the alt variable.
       // - http://www.w3.org/TR/REC-html40/struct/objects.html#h-13.8