1 files changed, 9 insertions, 3 deletions
diff --git a/src/libserialize/json.rs b/src/libserialize/json.rs
index 422914b1405..e6f46ea7159 100644
--- a/src/libserialize/json.rs
+++ b/src/libserialize/json.rs
@@ -425,7 +425,9 @@ impl<'a> ::Encoder<io::IoError> for Encoder<'a> {
     }
     fn emit_f32(&mut self, v: f32) -> EncodeResult { self.emit_f64(v as f64) }
 
-    fn emit_char(&mut self, v: char) -> EncodeResult { self.emit_str(str::from_char(v)) }
+    fn emit_char(&mut self, v: char) -> EncodeResult {
+        self.emit_str(str::from_char(v).as_slice())
+    }
     fn emit_str(&mut self, v: &str) -> EncodeResult {
         write!(self.wr, "{}", escape_str(v))
     }
@@ -614,9 +616,13 @@ impl<'a> ::Encoder<io::IoError> for PrettyEncoder<'a> {
     fn emit_f64(&mut self, v: f64) -> EncodeResult {
         write!(self.wr, "{}", f64::to_str_digits(v, 6u))
     }
-    fn emit_f32(&mut self, v: f32) -> EncodeResult { self.emit_f64(v as f64) }
+    fn emit_f32(&mut self, v: f32) -> EncodeResult {
+        self.emit_f64(v as f64)
+    }
 
-    fn emit_char(&mut self, v: char) -> EncodeResult { self.emit_str(str::from_char(v)) }
+    fn emit_char(&mut self, v: char) -> EncodeResult {
+        self.emit_str(str::from_char(v).as_slice())
+    }
     fn emit_str(&mut self, v: &str) -> EncodeResult {
         write!(self.wr, "{}", escape_str(v))
     }