Index: src/jvm/clojure/lang/Compiler.java
===================================================================
--- src/jvm/clojure/lang/Compiler.java	(revision 1065)
+++ src/jvm/clojure/lang/Compiler.java	(working copy)
@@ -2053,7 +2053,7 @@
 				}
 			}
 		if(ctors.isEmpty())
-			throw new IllegalArgumentException("No matching ctor found");
+			throw new IllegalArgumentException("No matching ctor found: " + c.getName());
 
 		int ctoridx = 0;
 		if(ctors.size() > 1)