diff --git a/yarn-project/p2p/src/config.ts b/yarn-project/p2p/src/config.ts
index 1a63706f2bab..8850545616fd 100644
--- a/yarn-project/p2p/src/config.ts
+++ b/yarn-project/p2p/src/config.ts
@@ -505,7 +505,7 @@ export const p2pConfigMappings: ConfigMappingsType<P2PConfig> = {
   l1PublishingTime: {
     env: 'SEQ_L1_PUBLISHING_TIME_ALLOWANCE_IN_SLOT',
     description: 'How much time (in seconds) we allow in the slot for publishing the L1 tx (defaults to 1 L1 slot).',
-    parseEnv: (val: string) => (val ? parseInt(val, 10) : undefined),
+    parseEnv: (val: string) => parseInt(val, 10),
   },
   fishermanMode: {
     env: 'FISHERMAN_MODE',
diff --git a/yarn-project/stdlib/src/config/sequencer-config.ts b/yarn-project/stdlib/src/config/sequencer-config.ts
index 6306498df184..7108011f0d04 100644
--- a/yarn-project/stdlib/src/config/sequencer-config.ts
+++ b/yarn-project/stdlib/src/config/sequencer-config.ts
@@ -41,7 +41,7 @@ export const sharedSequencerConfigMappings: ConfigMappingsType<
   attestationPropagationTime: {
     env: 'SEQ_ATTESTATION_PROPAGATION_TIME',
     description: 'How many seconds it takes for proposals and attestations to travel across the p2p layer (one-way).',
-    parseEnv: (val: string) => (val ? parseFloat(val) : undefined),
+    parseEnv: (val: string) => parseFloat(val),
     defaultValue: DEFAULT_P2P_PROPAGATION_TIME,
   },
 };