diff --git a/src/accountmanager.rs b/src/accountmanager.rs
index e389f7b..a9a0915 100644
--- a/src/accountmanager.rs
+++ b/src/accountmanager.rs
@@ -482,4 +482,38 @@ mod tests {
 				.account_name
 		);
 	}
+
+	#[test]
+	fn test_sda_compatibility_no_webcookie() {
+		let path = Path::new("src/fixtures/maFiles/compat/no-webcookie/manifest.json");
+		assert!(path.is_file());
+		let result = Manifest::load(path);
+		assert!(matches!(result, Ok(_)));
+		let mut manifest = result.unwrap();
+		assert!(matches!(manifest.entries.last().unwrap().encryption, None));
+		assert!(matches!(manifest.load_accounts(&None), Ok(_)));
+		assert_eq!(
+			manifest.entries.last().unwrap().account_name,
+			manifest
+				.accounts
+				.last()
+				.unwrap()
+				.lock()
+				.unwrap()
+				.account_name
+		);
+		assert_eq!(
+			manifest
+				.accounts
+				.last()
+				.unwrap()
+				.lock()
+				.unwrap()
+				.session
+				.as_ref()
+				.unwrap()
+				.web_cookie,
+			None
+		);
+	}
 }
diff --git a/src/fixtures/maFiles/compat/no-webcookie/manifest.json b/src/fixtures/maFiles/compat/no-webcookie/manifest.json
new file mode 100644
index 0000000..0e6c961
--- /dev/null
+++ b/src/fixtures/maFiles/compat/no-webcookie/manifest.json
@@ -0,0 +1 @@
+{"encrypted":false,"first_run":true,"entries":[{"encryption_iv":null,"encryption_salt":null,"filename":"nowebcookie.maFile","steamid":1234}],"periodic_checking":false,"periodic_checking_interval":5,"periodic_checking_checkall":false,"auto_confirm_market_transactions":false,"auto_confirm_trades":false}
\ No newline at end of file
diff --git a/src/fixtures/maFiles/compat/no-webcookie/nowebcookie.maFile b/src/fixtures/maFiles/compat/no-webcookie/nowebcookie.maFile
new file mode 100644
index 0000000..038907a
--- /dev/null
+++ b/src/fixtures/maFiles/compat/no-webcookie/nowebcookie.maFile
@@ -0,0 +1 @@
+{"shared_secret":"zvIayp3JPvtvX/QGHqsqKBk/44s=","serial_number":"kljasfhds","revocation_code":"R12345","uri":"otpauth://totp/Steam:example?secret=ASDF&issuer=Steam","server_time":1602522478,"account_name":"example","token_gid":"jkkjlhkhjgf","identity_secret":"kjsdlwowiqe=","secret_1":"sklduhfgsdlkjhf=","status":1,"device_id":"android:99d2ad0e-4bad-4247-b111-26393aae0be3","fully_enrolled":true,"Session":{"SessionID":"a;lskdjf","SteamLogin":"983498437543","SteamLoginSecure":"dlkjdsl;j%7C%32984730298","WebCookie":null,"OAuthToken":"asdk;lf;dsjlkfd","SteamID":1234}}
\ No newline at end of file
diff --git a/steamguard/src/steamapi.rs b/steamguard/src/steamapi.rs
index 19ea1c1..d57d961 100644
--- a/steamguard/src/steamapi.rs
+++ b/steamguard/src/steamapi.rs
@@ -99,7 +99,7 @@ pub struct Session {
 	#[serde(rename = "SteamLoginSecure")]
 	pub steam_login_secure: String,
 	#[serde(default, rename = "WebCookie")]
-	pub web_cookie: String,
+	pub web_cookie: Option<String>,
 	#[serde(rename = "OAuthToken")]
 	pub token: String,
 	#[serde(rename = "SteamID")]
@@ -153,7 +153,7 @@ impl SteamApiClient {
 			session_id: self
 				.extract_session_id()
 				.expect("failed to extract session id from cookies"),
-			web_cookie: data.webcookie.clone(),
+			web_cookie: Some(data.webcookie.clone()),
 		};
 	}