diff --git a/cmd/grpcurl/grpcurl.go b/cmd/grpcurl/grpcurl.go
index 7d83db4..66b2990 100644
--- a/cmd/grpcurl/grpcurl.go
+++ b/cmd/grpcurl/grpcurl.go
@@ -673,7 +673,6 @@ func main() {
 		}
 		h := &grpcurl.DefaultEventHandler{
 			Out:            os.Stdout,
-			DescSource:     descSource,
 			Formatter:      formatter,
 			VerbosityLevel: verbosityLevel,
 		}
diff --git a/format.go b/format.go
index dd1772a..98d6a24 100644
--- a/format.go
+++ b/format.go
@@ -409,9 +409,8 @@ func RequestParserAndFormatterFor(format Format, descSource DescriptorSource, em
 // safe for use with InvokeRPC as long as NumResponses and Status are not read
 // until the call to InvokeRPC completes.
 type DefaultEventHandler struct {
-	Out        io.Writer
-	DescSource DescriptorSource
-	Formatter  func(proto.Message) (string, error)
+	Out       io.Writer
+	Formatter Formatter
 	// 0 = default
 	// 1 = verbose
 	// 2 = very verbose
@@ -439,7 +438,6 @@ func NewDefaultEventHandler(out io.Writer, descSource DescriptorSource, formatte
 	}
 	return &DefaultEventHandler{
 		Out:            out,
-		DescSource:     descSource,
 		Formatter:      formatter,
 		VerbosityLevel: verbosityLevel,
 	}
@@ -449,7 +447,7 @@ var _ InvocationEventHandler = (*DefaultEventHandler)(nil)
 
 func (h *DefaultEventHandler) OnResolveMethod(md *desc.MethodDescriptor) {
 	if h.VerbosityLevel > 0 {
-		txt, err := GetDescriptorText(md, h.DescSource)
+		txt, err := GetDescriptorText(md, nil)
 		if err == nil {
 			fmt.Fprintf(h.Out, "\nResolved method descriptor:\n%s\n", txt)
 		}
diff --git a/format_test.go b/format_test.go
index b852f8a..1a36059 100644
--- a/format_test.go
+++ b/format_test.go
@@ -137,7 +137,6 @@ func TestHandler(t *testing.T) {
 				var buf bytes.Buffer
 				h := &DefaultEventHandler{
 					Out:            &buf,
-					DescSource:     source,
 					Formatter:      formatter,
 					VerbosityLevel: verbosityLevel,
 				}