diff --git a/include/aaruformat/context.h b/include/aaruformat/context.h
index fd53e50..dfa6f7b 100644
--- a/include/aaruformat/context.h
+++ b/include/aaruformat/context.h
@@ -344,6 +344,15 @@ typedef struct aaruformat_context
     void    *ps3_plaintext_regions;       ///< Parsed Ps3PlaintextRegion array (max 32), NULL if not loaded
     uint32_t ps3_plaintext_region_count;  ///< Number of plaintext regions
     bool     ps3_encryption_initialized;  ///< Whether lazy init has occurred
+
+    // Wii U encryption support (lazy-initialized on first use)
+    uint8_t *wiiu_disc_key;                ///< Cached disc key (16 bytes), NULL if not loaded
+    void    *wiiu_partition_regions;       ///< Parsed WiiuPartitionRegion array, NULL if not loaded
+    uint32_t wiiu_partition_region_count;  ///< Number of partition regions
+    bool     wiiu_encryption_initialized;  ///< Whether lazy init has occurred
+    uint8_t *wiiu_encrypted_block_cache;   ///< Cached re-encrypted 0x8000-byte physical sector
+    uint64_t wiiu_cached_physical_sector;  ///< Physical sector number of cached block
+    bool     wiiu_cache_valid;             ///< Whether the encrypted block cache is valid
 } aaruformat_context;
 
 /** \struct DumpHardwareEntriesWithData
diff --git a/src/close.c b/src/close.c
index b14f855..3651062 100644
--- a/src/close.c
+++ b/src/close.c
@@ -5293,6 +5293,29 @@ AARU_EXPORT int AARU_CALL aaruf_close(void *context)
     ctx->ps3_plaintext_region_count = 0;
     ctx->ps3_encryption_initialized = false;
 
+    // Free Wii U encryption context
+    if(ctx->wiiu_disc_key != NULL)
+    {
+        memset(ctx->wiiu_disc_key, 0, 16);
+        free(ctx->wiiu_disc_key);
+        ctx->wiiu_disc_key = NULL;
+    }
+    if(ctx->wiiu_partition_regions != NULL)
+    {
+        // Wipe keys from partition regions before freeing
+        uint32_t wiiu_count = ctx->wiiu_partition_region_count;
+        uint8_t *region_mem = (uint8_t *)ctx->wiiu_partition_regions;
+        // Each region entry contains a 16-byte key at offset 8; wipe the entire block
+        memset(region_mem, 0, wiiu_count * 24);
+        free(ctx->wiiu_partition_regions);
+        ctx->wiiu_partition_regions = NULL;
+    }
+    ctx->wiiu_partition_region_count = 0;
+    ctx->wiiu_encryption_initialized = false;
+    free(ctx->wiiu_encrypted_block_cache);
+    ctx->wiiu_encrypted_block_cache = NULL;
+    ctx->wiiu_cache_valid           = false;
+
     free(ctx->sector_id);
     free(ctx->sector_ied);
     free(ctx->sector_cpr_mai);