diff --git a/src/sgx/types/dtpm.rs b/src/sgx/types/dtpm.rs
index ebf36cf..7b33293 100644
--- a/src/sgx/types/dtpm.rs
+++ b/src/sgx/types/dtpm.rs
@@ -75,7 +75,7 @@ pub enum FileContent {
     Data(String),
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct EnvironmentEntry {
     pub name: String,
     pub value: String,
@@ -99,7 +99,7 @@ impl From<EnvironmentEntry> for dtpm_proto::EnvironmentEntry {
     }
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct ChildProcess {
     pub path: String,
     pub arguments: Vec<String>,