diff --git a/core/src/main/java/hudson/model/Job.java b/core/src/main/java/hudson/model/Job.java
index 548aced2f0f8c..8c4e3183100a9 100644
--- a/core/src/main/java/hudson/model/Job.java
+++ b/core/src/main/java/hudson/model/Job.java
@@ -128,7 +128,7 @@
 import org.kohsuke.stapler.verb.POST;
 
 /**
- * A job is a runnable entity under the monitoring of Hudson.
+ * A job is an runnable entity under the monitoring of Hudson.
  *
  * <p>
  * Every time it "runs", it will be recorded as a {@link Run} object.