diff --git a/cheriot/riscv_cheriot_instructions.cc b/cheriot/riscv_cheriot_instructions.cc
index a23bc7d..a1358c7 100644
--- a/cheriot/riscv_cheriot_instructions.cc
+++ b/cheriot/riscv_cheriot_instructions.cc
@@ -291,7 +291,7 @@
   if (pcc->IsSentry()) {
     if (pcc->object_type() != CapReg::kSentry) {
       bool interrupt_enable =
-          (pcc->object_type() == CapReg::kInterruptEnablingSentry) |
+          (pcc->object_type() == CapReg::kInterruptEnablingSentry) ||
           (pcc->object_type() == CapReg::kInterruptEnablingReturnSentry);
       mstatus->set_mie(interrupt_enable);
       mstatus->Submit();