diff --git a/packages/api/src/@types/BlockchainState.ts b/packages/api/src/@types/BlockchainState.ts
index f8a6986c11..3f1af4a790 100644
--- a/packages/api/src/@types/BlockchainState.ts
+++ b/packages/api/src/@types/BlockchainState.ts
@@ -53,7 +53,7 @@ type BlockchainState = {
   mempoolMinFees: MempoolMinFees;
   mempoolSize: number;
   nodeId: string;
-  peak: Peak;
+  peak: Peak | null; // Until FullNode is initialized, `peak` is `None(null)`
   space: number;
   averageBlockTime: number;
   subSlotIters: number;
diff --git a/packages/gui/src/components/farm/FarmHealth.tsx b/packages/gui/src/components/farm/FarmHealth.tsx
index 94de03838e..7f70f7057a 100644
--- a/packages/gui/src/components/farm/FarmHealth.tsx
+++ b/packages/gui/src/components/farm/FarmHealth.tsx
@@ -95,7 +95,7 @@ function FarmHealth() {
   const { data: poolStateData, isLoading: isLoadingPoolStateData } = useGetPoolStateQuery();
   const isTestnet = (useCurrencyCode() ?? 'XCH').toUpperCase() === 'TXCH';
   const { data: filterChallengeStat, isLoading: isLoadingFilterChallengeStat } = useGetFilterChallengeStatQuery({
-    height: blockchainState?.peak.height || 0,
+    height: blockchainState?.peak?.height || 0,
     isTestnet,
   });
   const [resetFilterChallengeStat] = useResetFilterChallengeStatMutation();