diff --git a/source/taggedalgebraic.d b/source/taggedalgebraic.d
index 5bc2a44..bd4cc79 100644
--- a/source/taggedalgebraic.d
+++ b/source/taggedalgebraic.d
@@ -8,7 +8,7 @@
 module taggedalgebraic;
 
 import std.typetuple;
-import std.traits : isInstanceOf;
+import std.traits : Unqual, isInstanceOf;
 
 // TODO:
 //  - distinguish between @property and non@-property methods.