diff --git a/crates/storage/src/lazy/lazy_array.rs b/crates/storage/src/lazy/lazy_array.rs
index 3464300dfa5..27ed2b9f4e7 100644
--- a/crates/storage/src/lazy/lazy_array.rs
+++ b/crates/storage/src/lazy/lazy_array.rs
@@ -215,12 +215,22 @@ impl<'a, T> DoubleEndedIterator for EntriesIter<'a, T> {
 
 impl<'a, T> ExactSizeIterator for EntriesIter<'a, T> {}
 
+use std::convert::TryInto;
 impl<T, const N: usize> EntryArray<T, N>
 {
     /// Creates a new entry array cache.
     pub fn new() -> Self {
+        let entries =
+            std::iter::repeat_with(|| Default::default())
+                .take(N)
+                .collect::<Vec<CacheCell<Option<StorageEntry<T>>>>>()
+                .try_into();
+        let entries = match entries {
+            Ok(entries) => entries,
+            Err(_) => unreachable!("f"),
+        };
         Self {
-            entries:  [(); N].map(|_|Default::default())
+            entries
         }
     }
 }
diff --git a/crates/storage/src/lib.rs b/crates/storage/src/lib.rs
index 91357473d98..62d93313c14 100644
--- a/crates/storage/src/lib.rs
+++ b/crates/storage/src/lib.rs
@@ -20,7 +20,6 @@
 //! FFI to interface with SRML contracts and a primitive blockchain
 //! emulator for simple off-chain testing.
 
-#![feature(array_map)]
 #![feature(array_methods)]
 #![feature(min_const_generics)]