diff --git a/martin/src/srv/fonts.rs b/martin/src/srv/fonts.rs
index 990d2ed68..47d2d7514 100644
--- a/martin/src/srv/fonts.rs
+++ b/martin/src/srv/fonts.rs
@@ -25,7 +25,7 @@ impl FontRequest {
     }
 
     fn parse_leading_digits(input: &str) -> Result<u32, &'static str> {
-        let digits: String = input.chars().take_while(|c| c.is_ascii_digit()).collect();
+        let digits: String = input.chars().take_while(char::is_ascii_digit).collect();
         if digits.is_empty() {
             Err("No leading digits found")
         } else {