diff --git a/docs/proxytunnel.1.adoc b/docs/proxytunnel.1.adoc
index 16e23f2..cf2846e 100644
--- a/docs/proxytunnel.1.adoc
+++ b/docs/proxytunnel.1.adoc
@@ -111,7 +111,7 @@ also be used for other proxy-traversing purposes like proxy bouncing.
     Add additional HTTP headers to send to proxy
 
 *-o*, *--host*=_STRING_::
-    Send a customer Host Header
+    Send a custom Host Header
 
 *-x*, *--proctitle*=_STRING_::
     Use a different process title