diff --git a/compiler/rustc_smir/src/rustc_smir/mod.rs b/compiler/rustc_smir/src/rustc_smir/mod.rs
index df682cd8f3ac3..6af6cfe58f184 100644
--- a/compiler/rustc_smir/src/rustc_smir/mod.rs
+++ b/compiler/rustc_smir/src/rustc_smir/mod.rs
@@ -114,9 +114,11 @@ impl<'tcx> Tables<'tcx> {
                 ),
             )),
             ty::Foreign(_) => todo!(),
-            ty::Str => todo!(),
-            ty::Array(_, _) => todo!(),
-            ty::Slice(_) => todo!(),
+            ty::Str => TyKind::RigidTy(RigidTy::Str),
+            ty::Array(ty, constant) => {
+                TyKind::RigidTy(RigidTy::Array(self.intern_ty(*ty), opaque(constant)))
+            }
+            ty::Slice(ty) => TyKind::RigidTy(RigidTy::Slice(self.intern_ty(*ty))),
             ty::RawPtr(_) => todo!(),
             ty::Ref(_, _, _) => todo!(),
             ty::FnDef(_, _) => todo!(),
diff --git a/compiler/rustc_smir/src/stable_mir/ty.rs b/compiler/rustc_smir/src/stable_mir/ty.rs
index 389e3364117f0..e9f17f92c04ac 100644
--- a/compiler/rustc_smir/src/stable_mir/ty.rs
+++ b/compiler/rustc_smir/src/stable_mir/ty.rs
@@ -26,6 +26,9 @@ pub enum RigidTy {
     Uint(UintTy),
     Float(FloatTy),
     Adt(AdtDef, AdtSubsts),
+    Str,
+    Array(Ty, Const),
+    Slice(Ty),
     Tuple(Vec<Ty>),
 }