diff --git a/src/lib.rs b/src/lib.rs
index 6cc1ea2..72eb33f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -844,7 +844,10 @@ mod imp {
         for chunk in dest.chunks_mut(u32::max_value() as usize) {
             let ret = unsafe { RtlGenRandom(chunk.as_mut_ptr(), chunk.len() as u32) };
             if ret == 0 {
-                return Err(io::Error::new(io::ErrorKind::Other, "failed to generate random bytes"));
+                return Err(io::Error::new(
+                    io::ErrorKind::Other,
+                    "failed to generate random bytes",
+                ));
             }
         }
         Ok(())