diff --git a/calendar/base/src/calEvent.js b/calendar/base/src/calEvent.js
index f0f00c1d9ce8..6314c3a7114e 100644
--- a/calendar/base/src/calEvent.js
+++ b/calendar/base/src/calEvent.js
@@ -107,7 +107,7 @@ calEvent.prototype = {
     set icalComponent(event) {
         if (this.mImmutable)
             throw Components.results.NS_ERROR_FAILURE;
-        if (event.componentType != "VEVENT"); {
+        if (event.componentType != "VEVENT") {
             event = event.getFirstSubcomponent("VEVENT");
             if (!event)
 
diff --git a/calendar/base/src/calEvent.js.pre b/calendar/base/src/calEvent.js.pre
index f4f9510e2ff7..f1e187dcff6e 100644
--- a/calendar/base/src/calEvent.js.pre
+++ b/calendar/base/src/calEvent.js.pre
@@ -152,7 +152,7 @@ calEvent.prototype = {
     set icalComponent(event) {
         if (this.mImmutable)
             throw Components.results.NS_ERROR_FAILURE;
-        if (event.componentType != "VEVENT"); {
+        if (event.componentType != "VEVENT") {
             event = event.getFirstSubcomponent("VEVENT");
             if (!event)
                 // throw Components.results.NS_ERROR_CALENDAR_WRONG_COMPONENT_TYPE;