diff --git a/src/libs/kata-types/src/config/agent.rs b/src/libs/kata-types/src/config/agent.rs
index 98ec142f4e..f30ab9a238 100644
--- a/src/libs/kata-types/src/config/agent.rs
+++ b/src/libs/kata-types/src/config/agent.rs
@@ -80,6 +80,7 @@ pub struct Agent {
     pub kernel_modules: Vec<String>,
 
     /// container pipe size
+    #[serde(default)]
     pub container_pipe_size: u32,
 }