diff --git a/src/librustc_metadata/creader.rs b/src/librustc_metadata/creader.rs
index 7965228d43be..d07179749d9a 100644
--- a/src/librustc_metadata/creader.rs
+++ b/src/librustc_metadata/creader.rs
@@ -298,7 +298,7 @@ impl<'a> CrateReader<'a> {
             if other.name() == crate_name && // same crate-name
                other.disambiguator() == disambiguator &&  // same crate-disambiguator
                other.hash() != svh { // but different SVH
-                span_fatal!(self.sess, span, E0522,
+                span_fatal!(self.sess, span, E0523,
                         "found two different crates with name `{}` that are \
                          not distinguished by differing `-C metadata`. This \
                          will result in symbol conflicts between the two.",
diff --git a/src/librustc_metadata/diagnostics.rs b/src/librustc_metadata/diagnostics.rs
index ea6e4b57bbae..8fa23de9a2d1 100644
--- a/src/librustc_metadata/diagnostics.rs
+++ b/src/librustc_metadata/diagnostics.rs
@@ -88,5 +88,5 @@ register_diagnostics! {
     E0469, // imported macro not found
     E0470, // reexported macro not found
     E0519, // local crate and dependency have same (crate-name, disambiguator)
-    E0522, // two dependencies have same (crate-name, disambiguator) but different SVH
+    E0523, // two dependencies have same (crate-name, disambiguator) but different SVH
 }