diff --git a/compiler/rustc_middle/src/ty/instance.rs b/compiler/rustc_middle/src/ty/instance.rs
index de012a6957419..23cedfd499eaa 100644
--- a/compiler/rustc_middle/src/ty/instance.rs
+++ b/compiler/rustc_middle/src/ty/instance.rs
@@ -499,7 +499,7 @@ impl<'tcx> Instance<'tcx> {
     }
 
     /// Returns a new `Instance` where generic parameters in `instance.substs` are replaced by
-    /// identify parameters if they are determined to be unused in `instance.def`.
+    /// identity parameters if they are determined to be unused in `instance.def`.
     pub fn polymorphize(self, tcx: TyCtxt<'tcx>) -> Self {
         debug!("polymorphize: running polymorphization analysis");
         if !tcx.sess.opts.debugging_opts.polymorphize {