diff --git a/components/style/values/specified/font.rs b/components/style/values/specified/font.rs
index fb4fa805212..03896bc9c0b 100644
--- a/components/style/values/specified/font.rs
+++ b/components/style/values/specified/font.rs
@@ -530,18 +530,8 @@ impl FontFamily {
 
     /// Parse a specified font-family value
     pub fn parse_specified<'i, 't>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
-        input
-            .parse_comma_separated(|input| SingleFontFamily::parse(input))
-            .map(|v| FontFamily::Values(FontFamilyList::new(v.into_boxed_slice())))
-    }
-
-    #[cfg(feature = "gecko")]
-    /// Return the generic ID if it is a single generic font
-    pub fn single_generic(&self) -> Option<u8> {
-        match *self {
-            FontFamily::Values(ref values) => values.single_generic(),
-            _ => None,
-        }
+        let values = input.parse_comma_separated(SingleFontFamily::parse)?;
+        Ok(FontFamily::Values(FontFamilyList::new(values.into_boxed_slice())))
     }
 }