diff --git a/cl/compile.go b/cl/compile.go
index a9aebce2..8d4d92d1 100644
--- a/cl/compile.go
+++ b/cl/compile.go
@@ -239,7 +239,7 @@ func (p *context) compileFuncDecl(pkg llssa.Package, f *ssa.Function, call bool)
 		sig = llssa.FuncAddCtx(ctx, sig)
 	} else {
 		if debugInstr {
-			log.Println("==> NewFunc", name, "type:", sig.Recv(), sig)
+			log.Println("==> NewFunc", name, "type:", sig.Recv(), sig, "ftype:", ftype)
 		}
 	}
 	if fn == nil {
diff --git a/ssa/type_cvt.go b/ssa/type_cvt.go
index 18a6576e..9bf505b6 100644
--- a/ssa/type_cvt.go
+++ b/ssa/type_cvt.go
@@ -172,7 +172,7 @@ func (p goTypes) cvtFunc(sig *types.Signature, recv *types.Var) (raw *types.Sign
 	}
 	params, cvt1 := p.cvtTuple(sig.Params())
 	results, cvt2 := p.cvtTuple(sig.Results())
-	if cvt1 || cvt2 {
+	if cvt1 || cvt2 || sig.Variadic() {
 		// variadic always is false in raw type for Go function
 		return types.NewSignatureType(nil, nil, nil, params, results, false)
 	}