diff --git a/staking/programs/integrity-pool/src/state/event.rs b/staking/programs/integrity-pool/src/state/event.rs
index c2e53d96..9c4e0f11 100644
--- a/staking/programs/integrity-pool/src/state/event.rs
+++ b/staking/programs/integrity-pool/src/state/event.rs
@@ -20,18 +20,20 @@ use {
 #[derive(AnchorSerialize, AnchorDeserialize, Debug, Clone, Copy, Zeroable, Pod, PartialEq, Eq)]
 #[repr(C)]
 pub struct Event {
-    pub epoch:      u64,
+    pub epoch:       u64,
     // storing historical values of y
-    pub y:          frac64,
-    pub event_data: [PublisherEventData; MAX_PUBLISHERS],
+    pub y:           frac64,
+    pub extra_space: [frac64; 7],
+    pub event_data:  [PublisherEventData; MAX_PUBLISHERS],
 }
 
 impl Default for Event {
     fn default() -> Self {
         Self {
-            epoch:      0,
-            y:          0,
-            event_data: [PublisherEventData::default(); MAX_PUBLISHERS],
+            epoch:       0,
+            y:           0,
+            extra_space: [0; 7],
+            event_data:  [PublisherEventData::default(); MAX_PUBLISHERS],
         }
     }
 }
diff --git a/staking/programs/integrity-pool/src/state/pool.rs b/staking/programs/integrity-pool/src/state/pool.rs
index 54d4e579..778ef0d4 100644
--- a/staking/programs/integrity-pool/src/state/pool.rs
+++ b/staking/programs/integrity-pool/src/state/pool.rs
@@ -493,9 +493,10 @@ mod tests {
 
 
         let mut event = Event {
-            epoch:      1,
-            y:          FRAC_64_MULTIPLIER / 10, // 10%
-            event_data: [PublisherEventData::default(); MAX_PUBLISHERS],
+            epoch:       1,
+            y:           FRAC_64_MULTIPLIER / 10, // 10%
+            extra_space: [0; 7],
+            event_data:  [PublisherEventData::default(); MAX_PUBLISHERS],
         };
 
         event.event_data[publisher_index] = PublisherEventData {