diff --git a/src/krist/api/types.ts b/src/krist/api/types.ts
index 736004c..93e700f 100644
--- a/src/krist/api/types.ts
+++ b/src/krist/api/types.ts
@@ -28,8 +28,8 @@
 export interface KristBlock {
   height: number;
   address: string;
-  hash: string;
-  short_hash: string;
+  hash?: string | null;
+  short_hash?: string | null;
   value: number;
   difficulty: number;
   time: string;
diff --git a/src/pages/blocks/BlockHash.tsx b/src/pages/blocks/BlockHash.tsx
index 0003cc5..da55526 100644
--- a/src/pages/blocks/BlockHash.tsx
+++ b/src/pages/blocks/BlockHash.tsx
@@ -14,15 +14,17 @@
 const SHORT_HASH_LENGTH = 12;
 
 interface Props {
-  hash: string;
+  hash?: string | null;
   alwaysCopyable?: boolean;
   neverCopyable?: boolean;
   className?: string;
 }
 
-export function BlockHash({ hash, alwaysCopyable, neverCopyable, className }: Props): JSX.Element {
+export function BlockHash({ hash, alwaysCopyable, neverCopyable, className }: Props): JSX.Element | null {
   const blockHashCopyButtons = useBooleanSetting("blockHashCopyButtons");
 
+  if (hash === undefined || hash === null) return null;
+
   // If the hash is longer than 12 characters (i.e. it's not just a short hash
   // on its own), then split it into two parts, so the short hash can be
   // highlighted. Otherwise, just put the whole hash in restHash.