diff --git a/compiler/rustc_const_eval/src/transform/validate.rs b/compiler/rustc_const_eval/src/transform/validate.rs
index 87b7c55bf7fb5..fbb129f97247e 100644
--- a/compiler/rustc_const_eval/src/transform/validate.rs
+++ b/compiler/rustc_const_eval/src/transform/validate.rs
@@ -284,7 +284,7 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
                         this.fail(
                         location,
                         format!(
-                            "Field projection `{:?}.{:?}` specified type `{:?}`, but actual type is {:?}",
+                            "Field projection `{:?}.{:?}` specified type `{:?}`, but actual type is `{:?}`",
                             parent, f, ty, f_ty
                         )
                     )