diff --git a/source/dub/dub.d b/source/dub/dub.d
index d1509c5..1a41cc3 100644
--- a/source/dub/dub.d
+++ b/source/dub/dub.d
@@ -785,7 +785,7 @@
 	{
 		const vrange = dep.visit!(
 			(VersionRange range) => range,
-			(any)                => throw new Exception("Cannot call `dub.fetch` with a " ~ typeof(any).stringof ~ " dependency"),
+			function VersionRange (any) { throw new Exception("Cannot call `dub.fetch` with a " ~ typeof(any).stringof ~ " dependency"); }
 		);
 		return this.fetch(packageId, vrange, location, options, reason);
 	}