diff --git a/source/taggedalgebraic.d b/source/taggedalgebraic.d
index 18a12d7..40e0ad9 100644
--- a/source/taggedalgebraic.d
+++ b/source/taggedalgebraic.d
@@ -603,7 +603,8 @@ unittest { // issue #1
 */
 ref inout(T) get(T, U)(ref inout(TaggedAlgebraic!U) ta)
 {
-	assert(hasType!(T, U)(ta));
+	import std.format : format;
+	assert(hasType!(T, U)(ta), () { scope (failure) assert(false); return format("Trying to get %s but have %s.", T.stringof, ta.kind); } ());
 	return ta.trustedGet!T;
 }