diff --git a/lib/compress.js b/lib/compress.js
index 34233143..343edc46 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2118,7 +2118,7 @@ merge(Compressor.prototype, {
                     }
                 }
             }
-            if (self.operator == "||") {
+            else if (self.operator == "||") {
                 var ll = self.left.evaluate(compressor);
                 var rr = self.right.evaluate(compressor);
                 if (ll.length > 1) {