diff --git a/src/backup/archive_index.rs b/src/backup/archive_index.rs
index c3d2ed21..075d4e45 100644
--- a/src/backup/archive_index.rs
+++ b/src/backup/archive_index.rs
@@ -16,7 +16,7 @@ pub struct ArchiveIndexHeader {
     pub version: u32,
     pub uuid: [u8; 16],
     pub ctime: u64,
-    reserved: [u8; 4056], // oversall size is one page (4096 bytes)
+    reserved: [u8; 4056], // overall size is one page (4096 bytes)
 }
 
 pub struct ArchiveIndexWriter<'a> {
diff --git a/src/backup/image_index.rs b/src/backup/image_index.rs
index 9437118e..8eabf547 100644
--- a/src/backup/image_index.rs
+++ b/src/backup/image_index.rs
@@ -16,7 +16,7 @@ pub struct ImageIndexHeader {
     pub ctime: u64,
     pub size: u64,
     pub chunk_size: u64,
-    reserved: [u8; 4040], // oversall size is one page (4096 bytes)
+    reserved: [u8; 4040], // overall size is one page (4096 bytes)
 }
 
 // split image into fixed size chunks