diff --git a/core/events/events_block_change.js b/core/events/events_block_change.js
index 38d8b5c67..3814a0d27 100644
--- a/core/events/events_block_change.js
+++ b/core/events/events_block_change.js
@@ -5,7 +5,7 @@
  */
 
 /**
- * @fileoverview Classes for all types of block events.
+ * @fileoverview Class for a block change event.
  * @author fenichel@google.com (Rachel Fenichel)
  */
 'use strict';
diff --git a/core/events/events_block_create.js b/core/events/events_block_create.js
index e3531dabe..2a6afb003 100644
--- a/core/events/events_block_create.js
+++ b/core/events/events_block_create.js
@@ -5,7 +5,7 @@
  */
 
 /**
- * @fileoverview Classes for all types of block events.
+ * @fileoverview Class for a block creation event.
  * @author fenichel@google.com (Rachel Fenichel)
  */
 'use strict';
diff --git a/core/events/events_block_delete.js b/core/events/events_block_delete.js
index 57275b31a..f44caa7f0 100644
--- a/core/events/events_block_delete.js
+++ b/core/events/events_block_delete.js
@@ -5,7 +5,7 @@
  */
 
 /**
- * @fileoverview Classes for all types of block events.
+ * @fileoverview Class for a block delete event.
  * @author fenichel@google.com (Rachel Fenichel)
  */
 'use strict';
diff --git a/core/events/events_block_move.js b/core/events/events_block_move.js
index 8ab5c5367..f026c080b 100644
--- a/core/events/events_block_move.js
+++ b/core/events/events_block_move.js
@@ -5,7 +5,7 @@
  */
 
 /**
- * @fileoverview Classes for a block move event.
+ * @fileoverview Class for a block move event.
  * @author fenichel@google.com (Rachel Fenichel)
  */
 'use strict';