diff --git a/lib/coffee-script/nodes.js b/lib/coffee-script/nodes.js
index f555bd76..7b7ff2cf 100644
--- a/lib/coffee-script/nodes.js
+++ b/lib/coffee-script/nodes.js
@@ -1153,6 +1153,9 @@
           }
         }
         if (!splat && obj instanceof Splat) {
+          if (!obj.name.unwrapAll().isAssignable()) {
+            throw SyntaxError("\"" + (obj.name.compile(o)) + "\" cannot be assigned.");
+          }
           name = obj.name.unwrap().value;
           val = "" + olen + " <= " + vvar + ".length ? " + (utility('slice')) + ".call(" + vvar + ", " + i;
           if (rest = olen - i - 1) {
diff --git a/src/nodes.coffee b/src/nodes.coffee
index 954ec9d1..4f3f2634 100644
--- a/src/nodes.coffee
+++ b/src/nodes.coffee
@@ -1005,6 +1005,8 @@ exports.Assign = class Assign extends Base
           else
             idx = if obj.this then obj.properties[0].name else obj
       if not splat and obj instanceof Splat
+        unless obj.name.unwrapAll().isAssignable()
+          throw SyntaxError "\"#{ obj.name.compile(o) }\" cannot be assigned."
         name = obj.name.unwrap().value
         val = "#{olen} <= #{vvar}.length ? #{ utility 'slice' }.call(#{vvar}, #{i}"
         if rest = olen - i - 1