diff --git a/src/pages/en/smart-contracts/core/guides/oracle-plugin-example.md b/src/pages/en/smart-contracts/core/guides/oracle-plugin-example.md
index 84625796..c67a69ec 100644
--- a/src/pages/en/smart-contracts/core/guides/oracle-plugin-example.md
+++ b/src/pages/en/smart-contracts/core/guides/oracle-plugin-example.md
@@ -110,7 +110,7 @@ pub struct Oracle {
     pub vault_bump: u8,
 }
 impl Space for Oracle {
-    const INIT_SPACE: usize = 8 + 5 + 1;
+    const INIT_SPACE: usize = 8 + 5 + 1+1;
 }
 ```
 Let's discuss some of the choices made in creating this struct:
diff --git a/src/pages/ja/smart-contracts/core/guides/oracle-plugin-example.md b/src/pages/ja/smart-contracts/core/guides/oracle-plugin-example.md
index 8036437b..61b48d0f 100644
--- a/src/pages/ja/smart-contracts/core/guides/oracle-plugin-example.md
+++ b/src/pages/ja/smart-contracts/core/guides/oracle-plugin-example.md
@@ -110,7 +110,7 @@ pub struct Oracle {
     pub vault_bump: u8,
 }
 impl Space for Oracle {
-    const INIT_SPACE: usize = 8 + 5 + 1;
+    const INIT_SPACE: usize = 8 + 5 + 1+1;
 }
 ```
 この構造体を作成する際の選択について説明しましょう：