diff --git a/services/wolf.sh b/services/wolf.sh
index add7cb3..50191af 100644
--- a/services/wolf.sh
+++ b/services/wolf.sh
@@ -3377,7 +3377,13 @@ PYEOF
         # Nothing else to do for Steam storage: Wolf's state folder lives on the
         # game drive, so Steam installs, games, and Proton prefixes land there
         # automatically the first time you connect. No fix-perms, no symlinks.
-        if echo "$APP_KEYS" | grep -qw steam; then
+        # _APP_KEYS, not APP_KEYS — this install-time copy uses the
+        # underscore-prefixed name (set earlier in install_wolf()); APP_KEYS
+        # is manage.sh's own copy's variable name. Confirmed live: this was
+        # a silent no-op under 'set -u' without 'set -e' (bash prints
+        # "APP_KEYS: unbound variable" and just continues), so the Steam
+        # storage-location message never printed but nothing else broke.
+        if echo "$_APP_KEYS" | grep -qw steam; then
             log_success "Steam will install games to $WOLF_STATE_DIR (on the game drive)"
         fi
     else