diff --git a/src/error.rs b/src/error.rs
index 96faed3202..faa271e07f 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -8,7 +8,7 @@ pub struct Error {
 pub type Result<T, E = Error> = result::Result<T, E>;
 
 impl Error {
-    pub fn new(errno: i32) -> Error {
+    pub const fn new(errno: i32) -> Error {
         Error { errno }
     }