diff --git a/src/scripts/cat_system/archive/int.rs b/src/scripts/cat_system/archive/int.rs
index 0906b7e..c881cdc 100644
--- a/src/scripts/cat_system/archive/int.rs
+++ b/src/scripts/cat_system/archive/int.rs
@@ -107,15 +107,14 @@ impl ScriptBuilder for CSIntArcBuilder {
     }
 }
 
-fn detect_script_type(
-    _buf: &[u8],
-    _buf_len: usize,
-    _filename: &str,
-) -> Option<&'static ScriptType> {
+fn detect_script_type(buf: &[u8], buf_len: usize, _filename: &str) -> Option<&'static ScriptType> {
     #[cfg(feature = "cat-system-img")]
-    if _buf_len >= 4 && _buf.starts_with(b"HG-3") {
+    if buf_len >= 4 && buf.starts_with(b"HG-3") {
         return Some(&ScriptType::CatSystemHg3);
     }
+    if buf_len >= 8 && buf.starts_with(b"CatScene") {
+        return Some(&ScriptType::CatSystem);
+    }
     None
 }