diff --git a/.changeset/tricky-bees-switch.md b/.changeset/tricky-bees-switch.md
new file mode 100644
index 000000000..685770cb0
--- /dev/null
+++ b/.changeset/tricky-bees-switch.md
@@ -0,0 +1,5 @@
+---
+"ponder": patch
+---
+
+Fixed a bug with traces containing invalid byte sequences.
diff --git a/packages/core/src/sync-store/encoding.ts b/packages/core/src/sync-store/encoding.ts
index d18e3d03f..69307db40 100644
--- a/packages/core/src/sync-store/encoding.ts
+++ b/packages/core/src/sync-store/encoding.ts
@@ -316,8 +316,10 @@ export function encodeTrace({
     input: trace.input,
     functionSelector: trace.input.slice(0, 10) as Hex,
     output: trace.output ?? null,
-    revertReason: trace.revertReason ?? null,
-    error: trace.error ?? null,
+    revertReason: trace.revertReason
+      ? trace.revertReason.replace(/\0/g, "")
+      : null,
+    error: trace.error ? trace.error.replace(/\0/g, "") : null,
     value: trace.value ? hexToBigInt(trace.value) : null,
     index: trace.index,
     subcalls: trace.subcalls,