diff --git a/docs/events.md b/docs/events.md
index b2d5df7..b2ec0a1 100644
--- a/docs/events.md
+++ b/docs/events.md
@@ -175,7 +175,8 @@ Emitted by `set_boost` when a user sets their allocation percentage.
 | Field | Rust Type | Description |
 | :--- | :--- | :--- |
 | `user` | `Address` | The user who set their boost allocation. |
-| `allocation_pct` | `u32` | The allocation percentage (1-100) applied. |
+| `old_allocation_pct` | `u32` | The previous allocation percentage (0 if user had no boost). |
+| `allocation_pct` | `u32` | The new allocation percentage (1-100) applied. |
 | `multiplier` | `u32` | The global multiplier in effect at the time of the call. |
 
 ### `mult_set` (boost)
diff --git a/soroban/contracts/farming-pool/src/lib.rs b/soroban/contracts/farming-pool/src/lib.rs
index 4e6b71e..dc82372 100644
--- a/soroban/contracts/farming-pool/src/lib.rs
+++ b/soroban/contracts/farming-pool/src/lib.rs
@@ -2019,7 +2019,7 @@ impl FarmingPool {
         let multiplier = read_global_multiplier(&env);
         env.events().publish(
             (symbol_short!("boost"), symbol_short!("applied")),
-            (user.clone(), allocation_pct, multiplier),
+            (user.clone(), old_alloc, allocation_pct, multiplier),
         );
 
         record_boost_event(&env, &user, old_alloc, allocation_pct);