diff --git a/runtime/src/bank.rs b/runtime/src/bank.rs
index ea3953c938..abb132f405 100644
--- a/runtime/src/bank.rs
+++ b/runtime/src/bank.rs
@@ -3065,7 +3065,7 @@ impl Bank {
     fn fix_recent_blockhashes_sysvar_delay(&self) -> bool {
         let activation_slot = match self.operating_mode() {
             OperatingMode::Development => 0,
-            OperatingMode::Preview => Slot::MAX / 2,
+            OperatingMode::Preview => 27_740_256, // Epoch 76
             OperatingMode::Stable => Slot::MAX / 2,
         };