diff --git a/src/lib.rs b/src/lib.rs
index f46af98..facb8bf 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -24,6 +24,11 @@ pub fn process_file(
     let mut buffer = Vec::new();
     File::open(path)?.read_to_end(&mut buffer)?;
     if !binary && buffer.find_byte(b'\0').is_some() {
+        let msg = report::BinaryFile {
+            path,
+            non_exhaustive: (),
+        };
+        report(msg.into());
         return Ok(());
     }
 
@@ -35,7 +40,7 @@ pub fn process_file(
             }
             if let Some(correction) = dictionary.correct_ident(ident) {
                 let col_num = ident.offset();
-                let msg = report::Message {
+                let msg = report::Correction {
                     path,
                     line,
                     line_num,
@@ -44,12 +49,12 @@ pub fn process_file(
                     correction,
                     non_exhaustive: (),
                 };
-                report(msg);
+                report(msg.into());
             }
             for word in ident.split() {
                 if let Some(correction) = dictionary.correct_word(word) {
                     let col_num = word.offset();
-                    let msg = report::Message {
+                    let msg = report::Correction {
                         path,
                         line,
                         line_num,
@@ -58,7 +63,7 @@ pub fn process_file(
                         correction,
                         non_exhaustive: (),
                     };
-                    report(msg);
+                    report(msg.into());
                 }
             }
         }
diff --git a/src/report.rs b/src/report.rs
index 129755a..6247264 100644
--- a/src/report.rs
+++ b/src/report.rs
@@ -2,7 +2,34 @@ use std::borrow::Cow;
 use std::io::{self, Write};
 
 #[derive(Clone, Debug, Serialize)]
-pub struct Message<'m> {
+#[serde(rename_all = "snake_case")]
+#[serde(tag = "type")]
+pub enum Message<'m> {
+    BinaryFile(BinaryFile<'m>),
+    Correction(Correction<'m>),
+}
+
+impl<'m> From<BinaryFile<'m>> for Message<'m> {
+    fn from(msg: BinaryFile<'m>) -> Self {
+        Message::BinaryFile(msg)
+    }
+}
+
+impl<'m> From<Correction<'m>> for Message<'m> {
+    fn from(msg: Correction<'m>) -> Self {
+        Message::Correction(msg)
+    }
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct BinaryFile<'m> {
+    pub path: &'m std::path::Path,
+    #[serde(skip)]
+    pub(crate) non_exhaustive: (),
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct Correction<'m> {
     pub path: &'m std::path::Path,
     #[serde(skip)]
     pub line: &'m [u8],
@@ -19,17 +46,33 @@ pub type Report = fn(msg: Message);
 pub fn print_silent(_: Message) {}
 
 pub fn print_brief(msg: Message) {
-    println!(
-        "{}:{}:{}: {} -> {}",
-        msg.path.display(),
-        msg.line_num,
-        msg.col_num,
-        msg.typo,
-        msg.correction
-    );
+    match msg {
+        Message::BinaryFile(msg) => {
+            println!("Skipping binary file {}", msg.path.display(),);
+        }
+        Message::Correction(msg) => {
+            println!(
+                "{}:{}:{}: {} -> {}",
+                msg.path.display(),
+                msg.line_num,
+                msg.col_num,
+                msg.typo,
+                msg.correction
+            );
+        }
+    }
 }
 
 pub fn print_long(msg: Message) {
+    match msg {
+        Message::BinaryFile(msg) => {
+            println!("Skipping binary file {}", msg.path.display(),);
+        }
+        Message::Correction(msg) => print_long_correction(msg),
+    }
+}
+
+fn print_long_correction(msg: Correction) {
     let line_num = msg.line_num.to_string();
     let line_indent: String = itertools::repeat_n(" ", line_num.len()).collect();