diff --git a/doc/developer-guides/network-virt-hld.rst b/doc/developer-guides/network-virt-hld.rst
index d4ae9260e..8ec6cde14 100644
--- a/doc/developer-guides/network-virt-hld.rst
+++ b/doc/developer-guides/network-virt-hld.rst
@@ -136,7 +136,7 @@ ACRN UOS TX FLOW
 ================
 
 The following shows the ACRN UOS network TX flow, using TCP as an
-example, showing the flow through each layer:.
+example, showing the flow through each layer:
 
 UOS TCP Layer
 -------------