diff --git a/jstests/disk/preallocate.js b/jstests/disk/preallocate.js
index 1822b575b79..c3c9bd09093 100644
--- a/jstests/disk/preallocate.js
+++ b/jstests/disk/preallocate.js
@@ -1,4 +1,4 @@
-port = allocatePorts( 1 )[ 0 ]
+port = allocatePorts( 1 )[ 0 ];
 
 var baseName = "jstests_preallocate";