diff --git a/misc/ahah.js b/misc/ahah.js
index 70199f35a26..ebfdffb75f9 100644
--- a/misc/ahah.js
+++ b/misc/ahah.js
@@ -220,7 +220,7 @@ Drupal.ahah.prototype.error = function (response, uri) {
   // Undo hide.
   $(this.wrapper).show();
   // Re-enable the element.
-  $(this.element).removeClass('progess-disabled').attr('disabled', false);
+  $(this.element).removeClass('progress-disabled').attr('disabled', false);
 };
 
 })(jQuery);
diff --git a/modules/system/system-rtl.css b/modules/system/system-rtl.css
index fb514652746..0983da8dc27 100644
--- a/modules/system/system-rtl.css
+++ b/modules/system/system-rtl.css
@@ -78,7 +78,7 @@ div.teaser-button-wrapper {
 .progress .percentage {
   float: left;
 }
-.progess-disabled {
+.progress-disabled {
   float: right;
 }
 .ahah-progress {