diff --git a/std/bitmanip.d b/std/bitmanip.d
index 6bf59f2a7..7f2990ed2 100644
--- a/std/bitmanip.d
+++ b/std/bitmanip.d
@@ -1816,7 +1816,8 @@ public:
     /***************************************
      * Support for unary operator ~ for `BitArray`.
      */
-    BitArray opCom() const pure nothrow
+    BitArray opUnary(string op)() const pure nothrow
+        if (op == "~")
     {
         auto dim = this.dim;