1 files changed, 4 insertions, 4 deletions
diff --git a/src/libsyntax/errors/mod.rs b/src/libsyntax/errors/mod.rs
index 04f540c81ae..7592214c0ab 100644
--- a/src/libsyntax/errors/mod.rs
+++ b/src/libsyntax/errors/mod.rs
@@ -235,17 +235,17 @@ impl<'a> DiagnosticBuilder<'a> {
     /// all, and you just supplied a `Span` to create the diagnostic,
     /// then the snippet will just include that `Span`, which is
     /// called the primary span.
-    pub fn span_label(mut self, span: Span, label: &fmt::Display)
-                      -> DiagnosticBuilder<'a> {
+    pub fn span_label(&mut self, span: Span, label: &fmt::Display)
+                      -> &mut DiagnosticBuilder<'a> {
         self.span.push_span_label(span, format!("{}", label));
         self
     }
 
-    pub fn note_expected_found(mut self,
+    pub fn note_expected_found(&mut self,
                                label: &fmt::Display,
                                expected: &fmt::Display,
                                found: &fmt::Display)
-                               -> DiagnosticBuilder<'a>
+                               -> &mut DiagnosticBuilder<'a>
     {
         // For now, just attach these as notes
         self.note(&format!("expected {} `{}`", label, expected));