diff --git a/src/io/readers/metadata_reader.rs b/src/io/readers/metadata_reader.rs
index 81c8e11..a439239 100644
--- a/src/io/readers/metadata_reader.rs
+++ b/src/io/readers/metadata_reader.rs
@@ -19,11 +19,17 @@ impl MetadataReader {
         let tdf_sql_reader = SqlReader::open(&sql_path).unwrap();
         let sql_metadata: HashMap<String, String> =
             SqlMetadata::from_sql_reader(&tdf_sql_reader).unwrap();
+        let compression_type = sql_metadata
+            .get("TimsCompressionType")
+            .unwrap()
+            .parse()
+            .unwrap();
         Metadata {
             path: path.as_ref().to_path_buf(),
             rt_converter: get_rt_converter(&tdf_sql_reader),
             im_converter: get_im_converter(&sql_metadata, &tdf_sql_reader),
             mz_converter: get_mz_converter(&sql_metadata),
+            compression_type,
         }
     }
 }
diff --git a/src/ms_data/acquisition.rs b/src/ms_data/acquisition.rs
index 790c503..b3e7be0 100644
--- a/src/ms_data/acquisition.rs
+++ b/src/ms_data/acquisition.rs
@@ -3,7 +3,7 @@
 pub enum AcquisitionType {
     DDAPASEF,
     DIAPASEF,
-    // DiagonalDIAPASEF,
+    DiagonalDIAPASEF,
     // PRMPASEF,
     /// Default value.
     #[default]
diff --git a/src/ms_data/metadata.rs b/src/ms_data/metadata.rs
index 8da4852..55766a5 100644
--- a/src/ms_data/metadata.rs
+++ b/src/ms_data/metadata.rs
@@ -11,4 +11,5 @@ pub struct Metadata {
     pub rt_converter: Frame2RtConverter,
     pub im_converter: Scan2ImConverter,
     pub mz_converter: Tof2MzConverter,
+    pub compression_type: u8,
 }