1 files changed, 1 insertions, 0 deletions
diff --git a/lib/compress.js b/lib/compress.js
index b2ed17cf..3e6218a0 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -993,6 +993,7 @@ merge(Compressor.prototype, {
                     return node.value;
                 };
                 d.fixed.assigns = [ node ];
+                if (node.name instanceof AST_SymbolConst && d.redefined()) d.single_use = false;
             } else {
                 d.fixed = false;
             }