diff --git a/internal/impl/convert.go b/internal/impl/convert.go
index 11a6128ba..185ef2efa 100644
--- a/internal/impl/convert.go
+++ b/internal/impl/convert.go
@@ -59,7 +59,6 @@ func NewConverter(t reflect.Type, fd protoreflect.FieldDescriptor) Converter {
 	default:
 		return newSingularConverter(t, fd)
 	}
-	panic(fmt.Sprintf("invalid Go type %v for field %v", t, fd.FullName()))
 }
 
 var (