diff --git a/src/config.rs b/src/config.rs
index c24b8ea..296e0b0 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -39,6 +39,7 @@ pub struct GUI {
    pub buttons: Buttons,
    pub press: PreSufFix,
    pub release: PreSufFix,
+   pub format: Option<String>,
 }
 
 #[derive(Serialize, Deserialize, Debug)]
@@ -128,6 +129,13 @@ fn build_config_std() -> Config {
                      prefix: env::var("INPUT_GUI_RELEASE_PREFIX").unwrap_or(String::from("!")),
                      suffix: env::var("INPUT_GUI_RELEASE_SUFFIX").unwrap_or(String::from("")),
                   },
+                  format: match env::var("INPUT_GUI_FORMAT") {
+                     Ok(x) => Some(x),
+                     Err(_) => match env::var("INPUT_GUI_FORMAT_V01").unwrap_or(String::from("false")) == String::from("true") {
+                        true => Some(String::from("TODO")),
+                        false => None,
+                     },
+                  },
                }),
                device: None,
                udp: Some(UDP{