diff --git a/packages/runs/src/state.mjs b/packages/runs/src/state.mjs
index af5cc927..0b58f712 100644
--- a/packages/runs/src/state.mjs
+++ b/packages/runs/src/state.mjs
@@ -66,7 +66,7 @@ function logEntry(line) {
 // rollback, which skips only lines that aren't JSON. A missing log is empty.
 // With last, only the newest last well-formed entries are returned.
 export function readActivationLog(dataRoot, { last } = {}) {
-  if (last !== undefined && (!Number.isInteger(last) || last < 1)) {
+  if (last !== undefined && (!Number.isInteger(last) || last < 0)) {
     throw new RunsError(`last must be a positive integer (got ${JSON.stringify(last)})`);
   }
   const state = readStateFile(dataRoot, ACTIVATION_LOG_FILE);