diff --git a/src/backend/lib/binaryheap.c b/src/backend/lib/binaryheap.c
index 7125970a50f..2994240c4b3 100644
--- a/src/backend/lib/binaryheap.c
+++ b/src/backend/lib/binaryheap.c
@@ -1,7 +1,7 @@
 /*-------------------------------------------------------------------------
  *
  * binaryheap.c
- *	  A simple binary heap implementaion
+ *	  A simple binary heap implementation
  *
  * Portions Copyright (c) 2012-2013, PostgreSQL Global Development Group
  *