diff --git a/src/librustdoc/html/static_files.rs b/src/librustdoc/html/static_files.rs
index afe920b7fa1..b4d4150cddb 100644
--- a/src/librustdoc/html/static_files.rs
+++ b/src/librustdoc/html/static_files.rs
@@ -19,9 +19,13 @@ fn new(filename: &str, bytes: &'static [u8]) -> StaticFile {
     }
 
     pub(crate) fn minified(&self) -> Vec<u8> {
-        if self.filename.ends_with(".css") {
+        let extension = match self.filename.extension() {
+            Some(e) => e,
+            None => return self.bytes.to_owned(),
+        };
+        if extension == "css" {
             minifier::css::minify(str::from_utf8(self.bytes).unwrap()).unwrap().to_string().into()
-        } else if self.filename.ends_with(".js") {
+        } else if extension == "js" {
             minifier::js::minify(str::from_utf8(self.bytes).unwrap()).to_string().into()
         } else {
             self.bytes.to_owned()