diff --git a/.changeset/rude-eels-yawn.md b/.changeset/rude-eels-yawn.md
new file mode 100644
index 00000000..bca7e24c
--- /dev/null
+++ b/.changeset/rude-eels-yawn.md
@@ -0,0 +1,5 @@
+---
+"@reactive-dot/core": patch
+---
+
+Fixed incorrect atom type when querying with block hash.
diff --git a/packages/core/src/actions/query.ts b/packages/core/src/actions/query.ts
index ff90dd8c..200e297b 100644
--- a/packages/core/src/actions/query.ts
+++ b/packages/core/src/actions/query.ts
@@ -18,6 +18,10 @@ export function preflight<TInstruction extends QueryInstruction>(
           ? "observable"
           : "promise" | "observable";
 
+  if ("at" in instruction && instruction.at?.startsWith("0x")) {
+    return "promise" as Return;
+  }
+
   switch (instruction.instruction) {
     case "get-constant":
     case "call-api":