1 files changed, 10 insertions, 2 deletions
diff --git a/src/libcore/fmt/float.rs b/src/libcore/fmt/float.rs
index e389775ce4c..e5fb148aded 100644
--- a/src/libcore/fmt/float.rs
+++ b/src/libcore/fmt/float.rs
@@ -352,8 +352,16 @@ pub fn float_to_str_bytes_common<T: Primitive + Float, U>(
 
             let mut filler = Filler { buf: buf, end: &mut end };
             match sign {
-                SignNeg => { let _ = write!(&mut filler, "{:-}", exp); }
-                SignNone | SignAll => { let _ = write!(&mut filler, "{}", exp); }
+                SignNeg => {
+                    let _ = format_args!(|args| {
+                        fmt::write(&mut filler, args)
+                    }, "{:-}", exp);
+                }
+                SignNone | SignAll => {
+                    let _ = format_args!(|args| {
+                        fmt::write(&mut filler, args)
+                    }, "{}", exp);
+                }
             }
         }
     }