diff --git a/calendar/base/content/calendar-month-view.xml b/calendar/base/content/calendar-month-view.xml
index bc55df4c4be..a72f433f09d 100644
--- a/calendar/base/content/calendar-month-view.xml
+++ b/calendar/base/content/calendar-month-view.xml
@@ -1357,11 +1357,18 @@
           function isNotItem(a) {
               return !a.hasSameIds(aItem);
           }
+          var oldLength = this.mSelectedItems.length;
           this.mSelectedItems = this.mSelectedItems.filter(isNotItem);
 
           for each (box in boxes) {
             box.box.deleteItem(aItem);
           }
+
+          // If a deleted event was selected, we need to announce that the
+          // selection changed.
+          if (oldLength != this.mSelectedItems.length) {
+              this.fireEvent("itemselect", this.mSelectedItems);
+          }
         ]]></body>
       </method>
 
diff --git a/calendar/base/content/calendar-multiday-view.xml b/calendar/base/content/calendar-multiday-view.xml
index 489c286b1ae..e42b92b83d1 100644
--- a/calendar/base/content/calendar-multiday-view.xml
+++ b/calendar/base/content/calendar-multiday-view.xml
@@ -2642,6 +2642,19 @@
                   column.deleteEvent(aEvent);
               }
           }
+
+          // See whether the item we are deleting was selected.  If it was, then
+          // fire the appropriate event so our watchers can update
+          var found = false;
+          for (var i = 0; i < this.mSelectedItems.length; i++) {
+              if (this.mSelectedItems[i].hasSameIds(aEvent)) {
+                  this.mSelectedItems.splice(i, 1);
+                  found = true;
+              }
+          }
+          if (found) {
+              this.fireEvent("itemselect", this.mSelectedItems);
+          }
         ]]></body>
       </method>