diff --git a/src/power.sh b/src/power.sh
index 4eebac7..5f2771c 100644
--- a/src/power.sh
+++ b/src/power.sh
@@ -24,6 +24,8 @@ _trap() {
   TRAP_PID=$BASHPID
 
   for sig; do
+    # Capture the local callback and signal while registering the trap.
+    # shellcheck disable=SC2064
     trap "$func $sig" "$sig"
   done