diff --git a/harness/reflect.go b/harness/reflect.go
index f4ff4e6..dffcc94 100644
--- a/harness/reflect.go
+++ b/harness/reflect.go
@@ -433,7 +433,8 @@ func appendAction(fset *token.FileSet, mm methodMap, decl ast.Decl, pkgImportPat
 			var importPath string
 			typeExpr := NewTypeExpr(pkgName, field.Type)
 			if !typeExpr.Valid {
-				return // We didn't understand one of the args.  Ignore this action. (Already logged)
+				log.Printf("Didn't understand argument '%s' of action %s. Ignoring.\n", name, getFuncName(funcDecl))
+				return // We didn't understand one of the args.  Ignore this action.
 			}
 			if typeExpr.PkgName != "" {
 				var ok bool