1 files changed, 3 insertions, 1 deletions
diff --git a/lib/compress.js b/lib/compress.js
index 1862fd10..27b080bb 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -10051,7 +10051,9 @@ merge(Compressor.prototype, {
             found = true;
             var exp = prop.expression;
             if (compressor.option("spread") && exp instanceof AST_Object && all(exp.properties, function(prop) {
-                return !(prop instanceof AST_ObjectGetter || prop instanceof AST_Spread);
+                return !(prop instanceof AST_ObjectGetter
+                    || prop instanceof AST_ObjectSetter && prop.key instanceof AST_Node
+                    || prop instanceof AST_Spread);
             })) {
                 changed = true;
                 exp.properties.forEach(function(prop) {