diff --git a/packages/python/e2e-attestations/claude-1330-vtab-prefetch-flag.json b/packages/python/e2e-attestations/claude-1330-vtab-prefetch-flag.json
new file mode 100644
index 000000000..165a85724
--- /dev/null
+++ b/packages/python/e2e-attestations/claude-1330-vtab-prefetch-flag.json
@@ -0,0 +1,7 @@
+{
+  "command": "uv run python -m pytest tests/e2e/query_contract_test.py tests/e2e/declared_table_name_test.py tests/e2e/fanout_test.py -x -q",
+  "ran_at": 1791310416,
+  "exit_code": 0,
+  "commit": "bcedde49401cf6f9cc01deb2d95af1d1e907f0f7",
+  "branch": "claude/1330-vtab-prefetch-flag"
+}
diff --git a/packages/rust/src/vtab_scaffold.rs b/packages/rust/src/vtab_scaffold.rs
index 7ae701a64..d709f5b1d 100644
--- a/packages/rust/src/vtab_scaffold.rs
+++ b/packages/rust/src/vtab_scaffold.rs
@@ -331,7 +331,7 @@ fn lookup_cost(prefetch: bool) -> f64 {
 fn plan_idx_num(lookup: Option<usize>, prefetch: bool) -> c_int {
     let lookup = lookup.map_or(SCAN_IDX, lookup_idx_num);
     if prefetch {
-        lookup | PREFETCH_IDX
+        lookup + PREFETCH_IDX
     } else {
         lookup
     }
diff --git a/packages/ts/e2e-attestations/claude-1330-vtab-prefetch-flag.json b/packages/ts/e2e-attestations/claude-1330-vtab-prefetch-flag.json
new file mode 100644
index 000000000..c6a3ccdbb
--- /dev/null
+++ b/packages/ts/e2e-attestations/claude-1330-vtab-prefetch-flag.json
@@ -0,0 +1,7 @@
+{
+  "command": "pnpm test:e2e",
+  "ran_at": 1791310512,
+  "exit_code": 0,
+  "commit": "960cd7611f05e3e93ba4c485e19713e98beca405",
+  "branch": "claude/1330-vtab-prefetch-flag"
+}