diff --git a/src/eth/primitives/slot_index.rs b/src/eth/primitives/slot_index.rs
index eb5f5ca84..559ac9636 100644
--- a/src/eth/primitives/slot_index.rs
+++ b/src/eth/primitives/slot_index.rs
@@ -33,7 +33,7 @@ impl SlotIndex {
         mapping_index_bytes[32..64].copy_from_slice(&slot_index_bytes);
 
         let hashed_bytes = keccak256(mapping_index_bytes);
-        Self::from(hashed_bytes.0)
+        Self::from(hashed_bytes)
     }
 }
 
@@ -67,6 +67,12 @@ impl From<RevmU256> for SlotIndex {
     }
 }
 
+impl From<FixedBytes<32>> for SlotIndex {
+    fn from(value: FixedBytes<32>) -> Self {
+        Self::from(value.0)
+    }
+}
+
 // -----------------------------------------------------------------------------
 // Tests
 // -----------------------------------------------------------------------------