diff --git a/staking-api/src/queries.ts b/staking-api/src/queries.ts
index 6fd8ad9c..762feb27 100644
--- a/staking-api/src/queries.ts
+++ b/staking-api/src/queries.ts
@@ -565,6 +565,8 @@ export const currentEpochPoolStatsQuery = `
                     fbp.protocol_fees = 0 OR
                     ts.total_staked = 0
                 THEN
+                    NULL
+                ELSE
                     (cebs.zrx_delegated / ts.total_staked)
                     / (fbp.protocol_fees / tf.total_protocol_fees)
                 END AS approximate_stake_ratio