diff --git a/app/src/main/cpp/skyline/vfs/ctr_encrypted_backing.cpp b/app/src/main/cpp/skyline/vfs/ctr_encrypted_backing.cpp
index 53f504f7..e539d7b9 100644
--- a/app/src/main/cpp/skyline/vfs/ctr_encrypted_backing.cpp
+++ b/app/src/main/cpp/skyline/vfs/ctr_encrypted_backing.cpp
@@ -6,7 +6,7 @@
 namespace skyline::vfs {
     constexpr size_t SectorSize{0x10};
 
-    CtrEncryptedBacking::CtrEncryptedBacking(crypto::KeyStore::Key128 ctr, crypto::KeyStore::Key128 key, std::shared_ptr<Backing> backing, size_t baseOffset) : Backing({true, false, false}), ctr(ctr), cipher(key, MBEDTLS_CIPHER_AES_128_CTR), backing(std::move(backing)), baseOffset(baseOffset) {
+    CtrEncryptedBacking::CtrEncryptedBacking(crypto::KeyStore::Key128 ctr, crypto::KeyStore::Key128 key, std::shared_ptr<Backing> backing, size_t baseOffset) : Backing({true, false, false}, backing->size), ctr(ctr), cipher(key, MBEDTLS_CIPHER_AES_128_CTR), backing(std::move(backing)), baseOffset(baseOffset) {
         if (mode.write || mode.append)
             throw exception("Cannot open a CtrEncryptedBacking as writable");
     }