diff --git a/src/config.rs b/src/config.rs
index 5a4ab8973..675f61341 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,7 +1,13 @@
 use std::io::Read;
 
 pub trait ConfigSource {
-    fn walk(&self) -> Option<&dyn WalkSource>;
+    fn walk(&self) -> Option<&dyn WalkSource> {
+        None
+    }
+
+    fn default(&self) -> Option<&dyn FileSource> {
+        None
+    }
 }
 
 pub trait WalkSource {
@@ -41,11 +47,29 @@ pub trait WalkSource {
     }
 }
 
+pub trait FileSource {
+    /// Verifying spelling in file names.
+    fn check_filename(&self) -> Option<bool> {
+        None
+    }
+
+    /// Verifying spelling in filess.
+    fn check_file(&self) -> Option<bool> {
+        None
+    }
+
+    /// Do not check identifiers that appear to be hexadecimal values
+    fn ignore_hex(&self) -> Option<bool> {
+        None
+    }
+}
+
 #[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
 #[serde(deny_unknown_fields, default)]
 #[serde(rename_all = "kebab-case")]
 pub struct Config {
     pub files: Walk,
+    pub default: FileConfig,
 }
 
 impl Config {
@@ -73,6 +97,9 @@ impl Config {
         if let Some(walk) = source.walk() {
             self.files.update(walk);
         }
+        if let Some(default) = source.default() {
+            self.default.update(default);
+        }
     }
 }
 
@@ -193,6 +220,55 @@ impl WalkSource for Walk {
     }
 }
 
+#[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
+#[serde(deny_unknown_fields, default)]
+#[serde(rename_all = "kebab-case")]
+pub struct FileConfig {
+    pub check_filename: Option<bool>,
+    pub check_file: Option<bool>,
+    pub ignore_hex: Option<bool>,
+}
+
+impl FileConfig {
+    pub fn update(&mut self, source: &dyn FileSource) {
+        if let Some(source) = source.check_filename() {
+            self.check_filename = Some(source);
+        }
+        if let Some(source) = source.check_file() {
+            self.check_file = Some(source);
+        }
+        if let Some(source) = source.ignore_hex() {
+            self.ignore_hex = Some(source);
+        }
+    }
+
+    pub fn check_filename(&self) -> bool {
+        self.check_filename.unwrap_or(true)
+    }
+
+    pub fn check_file(&self) -> bool {
+        self.check_file.unwrap_or(true)
+    }
+
+    pub fn ignore_hex(&self) -> bool {
+        self.ignore_hex.unwrap_or(true)
+    }
+}
+
+impl FileSource for FileConfig {
+    fn check_filename(&self) -> Option<bool> {
+        self.check_filename
+    }
+
+    fn check_file(&self) -> Option<bool> {
+        self.check_file
+    }
+
+    fn ignore_hex(&self) -> Option<bool> {
+        self.ignore_hex
+    }
+}
+
 fn find_project_file(dir: std::path::PathBuf, name: &str) -> Option<std::path::PathBuf> {
     let mut file_path = dir;
     file_path.push(name);
diff --git a/src/main.rs b/src/main.rs
index 43f32187c..a49f32d89 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -50,31 +50,8 @@ struct Args {
     /// Ignore implicit configuration files.
     isolated: bool,
 
-    #[structopt(long, raw(overrides_with = r#""check-filenames""#))]
-    /// Skip verifying spelling in file names.
-    no_check_filenames: bool,
-    #[structopt(
-        long,
-        raw(overrides_with = r#""no-check-filenames""#),
-        raw(hidden = "true")
-    )]
-    check_filenames: bool,
-
-    #[structopt(long, raw(overrides_with = r#""check-files""#))]
-    /// Skip verifying spelling in filess.
-    no_check_files: bool,
-    #[structopt(
-        long,
-        raw(overrides_with = r#""no-check-files""#),
-        raw(hidden = "true")
-    )]
-    check_files: bool,
-
-    #[structopt(long, raw(overrides_with = r#""hex""#))]
-    /// Don't try to detect that an identifier looks like hex
-    no_hex: bool,
-    #[structopt(long, raw(overrides_with = r#""no-hex""#), raw(hidden = "true"))]
-    hex: bool,
+    #[structopt(flatten)]
+    overrides: FileArgs,
 
     #[structopt(
         long = "format",
@@ -94,33 +71,6 @@ impl Args {
     pub fn infer(self) -> Self {
         self
     }
-
-    pub fn check_files(&self) -> Option<bool> {
-        match (self.check_files, self.no_check_files) {
-            (true, false) => Some(true),
-            (false, true) => Some(false),
-            (false, false) => None,
-            (_, _) => unreachable!("StructOpt should make this impossible"),
-        }
-    }
-
-    pub fn check_filenames(&self) -> Option<bool> {
-        match (self.check_filenames, self.no_check_filenames) {
-            (true, false) => Some(true),
-            (false, true) => Some(false),
-            (false, false) => None,
-            (_, _) => unreachable!("StructOpt should make this impossible"),
-        }
-    }
-
-    pub fn ignore_hex(&self) -> Option<bool> {
-        match (self.no_hex, self.hex) {
-            (true, false) => Some(false),
-            (false, true) => Some(true),
-            (false, false) => None,
-            (_, _) => unreachable!("StructOpt should make this impossible"),
-        }
-    }
 }
 
 #[derive(Debug, StructOpt)]
@@ -255,6 +205,65 @@ impl config::WalkSource for WalkArgs {
     }
 }
 
+#[derive(Debug, StructOpt)]
+#[structopt(rename_all = "kebab-case")]
+pub struct FileArgs {
+    #[structopt(long, raw(overrides_with = r#""check-filenames""#))]
+    /// Skip verifying spelling in file names.
+    no_check_filenames: bool,
+    #[structopt(
+        long,
+        raw(overrides_with = r#""no-check-filenames""#),
+        raw(hidden = "true")
+    )]
+    check_filenames: bool,
+
+    #[structopt(long, raw(overrides_with = r#""check-files""#))]
+    /// Skip verifying spelling in filess.
+    no_check_files: bool,
+    #[structopt(
+        long,
+        raw(overrides_with = r#""no-check-files""#),
+        raw(hidden = "true")
+    )]
+    check_files: bool,
+
+    #[structopt(long, raw(overrides_with = r#""hex""#))]
+    /// Don't try to detect that an identifier looks like hex
+    no_hex: bool,
+    #[structopt(long, raw(overrides_with = r#""no-hex""#), raw(hidden = "true"))]
+    hex: bool,
+}
+
+impl config::FileSource for FileArgs {
+    fn check_filename(&self) -> Option<bool> {
+        match (self.check_filenames, self.no_check_filenames) {
+            (true, false) => Some(true),
+            (false, true) => Some(false),
+            (false, false) => None,
+            (_, _) => unreachable!("StructOpt should make this impossible"),
+        }
+    }
+
+    fn check_file(&self) -> Option<bool> {
+        match (self.check_files, self.no_check_files) {
+            (true, false) => Some(true),
+            (false, true) => Some(false),
+            (false, false) => None,
+            (_, _) => unreachable!("StructOpt should make this impossible"),
+        }
+    }
+
+    fn ignore_hex(&self) -> Option<bool> {
+        match (self.hex, self.no_hex) {
+            (true, false) => Some(true),
+            (false, true) => Some(false),
+            (false, false) => None,
+            (_, _) => unreachable!("StructOpt should make this impossible"),
+        }
+    }
+}
+
 pub fn get_logging(level: log::Level) -> env_logger::Builder {
     let mut builder = env_logger::Builder::new();
 
@@ -304,17 +313,18 @@ fn run() -> Result<i32, failure::Error> {
             config.update(&derived);
         }
         config.update(&args.config);
+        config.default.update(&args.overrides);
         let config = config;
 
         let dictionary = typos::BuiltIn::new();
 
         let parser = typos::tokens::ParserBuilder::new()
-            .ignore_hex(args.ignore_hex().unwrap_or(true))
+            .ignore_hex(config.default.ignore_hex())
             .build();
 
         let checks = typos::checks::CheckSettings::new()
-            .check_filenames(args.check_filenames().unwrap_or(true))
-            .check_files(args.check_files().unwrap_or(true))
+            .check_filenames(config.default.check_filename())
+            .check_files(config.default.check_file())
             .binary(config.files.binary())
             .build(&dictionary, &parser);