diff --git a/src/config.rs b/src/config.rs
index d1a6d20..80903f6 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -62,6 +62,16 @@ pub trait FileSource {
     fn ignore_hex(&self) -> Option<bool> {
         None
     }
+
+    /// Allow identifiers to include digits, in addition to letters
+    fn identifier_include_digits(&self) -> Option<bool> {
+        None
+    }
+
+    /// Specify additional characters to be included in identifiers
+    fn identifier_include_chars(&self) -> Option<&str> {
+        None
+    }
 }
 
 #[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
@@ -223,6 +233,8 @@ pub struct FileConfig {
     pub check_filename: Option<bool>,
     pub check_file: Option<bool>,
     pub ignore_hex: Option<bool>,
+    pub identifier_include_digits: Option<bool>,
+    pub identifier_include_chars: Option<String>,
 }
 
 impl FileConfig {
@@ -236,6 +248,12 @@ impl FileConfig {
         if let Some(source) = source.ignore_hex() {
             self.ignore_hex = Some(source);
         }
+        if let Some(source) = source.identifier_include_digits() {
+            self.identifier_include_digits = Some(source);
+        }
+        if let Some(source) = source.identifier_include_chars() {
+            self.identifier_include_chars = Some(source.to_owned());
+        }
     }
 
     pub fn check_filename(&self) -> bool {
@@ -249,6 +267,17 @@ impl FileConfig {
     pub fn ignore_hex(&self) -> bool {
         self.ignore_hex.unwrap_or(true)
     }
+
+    pub fn identifier_include_digits(&self) -> bool {
+        self.identifier_include_digits.unwrap_or(true)
+    }
+
+    pub fn identifier_include_chars(&self) -> &str {
+        self.identifier_include_chars
+            .as_ref()
+            .map(|s| s.as_str())
+            .unwrap_or("_'")
+    }
 }
 
 impl FileSource for FileConfig {
@@ -263,6 +292,14 @@ impl FileSource for FileConfig {
     fn ignore_hex(&self) -> Option<bool> {
         self.ignore_hex
     }
+
+    fn identifier_include_digits(&self) -> Option<bool> {
+        self.identifier_include_digits
+    }
+
+    fn identifier_include_chars(&self) -> Option<&str> {
+        self.identifier_include_chars.as_ref().map(|s| s.as_str())
+    }
 }
 
 fn find_project_file(dir: std::path::PathBuf, name: &str) -> Option<std::path::PathBuf> {
diff --git a/src/main.rs b/src/main.rs
index e655e7b..319858c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -314,6 +314,8 @@ fn run() -> Result<i32, failure::Error> {
 
         let parser = typos::tokens::ParserBuilder::new()
             .ignore_hex(config.default.ignore_hex())
+            .include_digits(config.default.identifier_include_digits())
+            .include_chars(config.default.identifier_include_chars().to_owned())
             .build();
 
         let checks = typos::checks::CheckSettings::new()