diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fe25d8e..8e90240 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,6 +16,6 @@ jobs:
     - name: Check code styles
       run: cargo fmt --check
     - name: Run Clippy
-      run: cargo clippy
+      run: cargo clippy -- -D warnings
     - name: Run tests
       run: cargo test
diff --git a/src/file.rs b/src/file.rs
index 2f60b1f..7e27794 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -29,6 +29,10 @@ impl<I: Read + Seek> File<I> {
         self.name.as_ref()
     }
 
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+
     pub fn len(&self) -> u64 {
         self.stream.valid_data_length()
     }
@@ -48,8 +52,8 @@ impl<I: Read + Seek> File<I> {
         let fat = self.image.fat() as *const Fat;
         let mut image = Box::new(self.image.reader());
         let reader = match ClustersReader::new(
-            unsafe { transmute(params) },
-            unsafe { transmute(fat) },
+            unsafe { transmute(&*params) },
+            unsafe { transmute(&*fat) },
             unsafe { transmute(image.as_mut().deref_mut()) },
             first_cluster,
             Some(self.stream.valid_data_length()),