diff --git a/rustup-init.sh b/rustup-init.sh
index d1e43f5378..f2f2c79fc4 100755
--- a/rustup-init.sh
+++ b/rustup-init.sh
@@ -14,7 +14,8 @@
 # mksh has this alias by default.
 has_local() {
     # shellcheck disable=SC2034  # deliberately unused
-    local _has_local
+    # shellcheck disable=SC1007  # PATH= is an intentional command prefix, not a bare assignment
+    PATH= local _has_local
 }
 
 has_local 2>/dev/null || alias local=typeset