diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 71617347e4c..56ccea19b8a 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -4800,7 +4800,7 @@ impl ParseIntError {
                reason = "it can be useful to match errors when making error messages \
                          for integer parsing",
                issue = "22639")]
-    pub fn kind(self) -> IntErrorKind {
+    pub fn kind(&self) -> &IntErrorKind {
         self.kind
     }
     #[unstable(feature = "int_error_internals",