diff --git a/man/docker-run.1.md b/man/docker-run.1.md
index 5224895c91..061f509c27 100644
--- a/man/docker-run.1.md
+++ b/man/docker-run.1.md
@@ -907,7 +907,7 @@ should fix the problem.
 ## Mapping Ports for External Usage
 
 The exposed port of an application can be mapped to a host port using the **-p**
-flag. For example, a httpd port 80 can be mapped to the host port 8080 using the
+flag. For example, an httpd port 80 can be mapped to the host port 8080 using the
 following:
 
     # docker run -p 8080:80 -d -i -t fedora/httpd