diff --git a/eth2/state_processing/src/per_epoch_processing/apply_rewards.rs b/eth2/state_processing/src/per_epoch_processing/apply_rewards.rs
index 0cb271d60e..83588ad7ae 100644
--- a/eth2/state_processing/src/per_epoch_processing/apply_rewards.rs
+++ b/eth2/state_processing/src/per_epoch_processing/apply_rewards.rs
@@ -133,7 +133,7 @@ fn get_attestation_deltas<T: EthSpec>(
 
 /// Determine the delta for a single validator, sans proposer rewards.
 ///
-/// Spec v0.10.1
+/// Spec v0.11.0
 fn get_attestation_delta<T: EthSpec>(
     validator: &ValidatorStatus,
     total_balances: &TotalBalances,
@@ -152,16 +152,24 @@ fn get_attestation_delta<T: EthSpec>(
         return delta;
     }
 
-    let total_balance = total_balances.current_epoch;
-    let total_attesting_balance = total_balances.previous_epoch_attesters;
-    let matching_target_balance = total_balances.previous_epoch_target_attesters;
-    let matching_head_balance = total_balances.previous_epoch_head_attesters;
+    // Handle integer overflow by dividing these quantities by EFFECTIVE_BALANCE_INCREMENT
+    // Spec:
+    // - increment = EFFECTIVE_BALANCE_INCREMENT
+    // - reward_numerator = get_base_reward(state, index) * (attesting_balance // increment)
+    // - rewards[index] = reward_numerator // (total_balance // increment)
+    let total_balance_ebi = total_balances.current_epoch / spec.effective_balance_increment;
+    let total_attesting_balance_ebi =
+        total_balances.previous_epoch_attesters / spec.effective_balance_increment;
+    let matching_target_balance_ebi =
+        total_balances.previous_epoch_target_attesters / spec.effective_balance_increment;
+    let matching_head_balance_ebi =
+        total_balances.previous_epoch_head_attesters / spec.effective_balance_increment;
 
     // Expected FFG source.
     // Spec:
     // - validator index in `get_unslashed_attesting_indices(state, matching_source_attestations)`
     if validator.is_previous_epoch_attester && !validator.is_slashed {
-        delta.reward(base_reward * total_attesting_balance / total_balance);
+        delta.reward(base_reward * total_attesting_balance_ebi / total_balance_ebi);
         // Inclusion speed bonus
         let proposer_reward = base_reward / spec.proposer_reward_quotient;
         let max_attester_reward = base_reward - proposer_reward;
@@ -177,7 +185,7 @@ fn get_attestation_delta<T: EthSpec>(
     // Spec:
     // - validator index in `get_unslashed_attesting_indices(state, matching_target_attestations)`
     if validator.is_previous_epoch_target_attester && !validator.is_slashed {
-        delta.reward(base_reward * matching_target_balance / total_balance);
+        delta.reward(base_reward * matching_target_balance_ebi / total_balance_ebi);
     } else {
         delta.penalize(base_reward);
     }
@@ -186,7 +194,7 @@ fn get_attestation_delta<T: EthSpec>(
     // Spec:
     // - validator index in `get_unslashed_attesting_indices(state, matching_head_attestations)`
     if validator.is_previous_epoch_head_attester && !validator.is_slashed {
-        delta.reward(base_reward * matching_head_balance / total_balance);
+        delta.reward(base_reward * matching_head_balance_ebi / total_balance_ebi);
     } else {
         delta.penalize(base_reward);
     }