diff --git a/rpc_util.go b/rpc_util.go
index fe3748d9..080ebb14 100644
--- a/rpc_util.go
+++ b/rpc_util.go
@@ -406,10 +406,10 @@ func convertCode(err error) codes.Code {
 	return codes.Unknown
 }
 
-// SupportPackageIsVersion2 is referenced from generated protocol buffer files
+// SupportPackageIsVersion3 is referenced from generated protocol buffer files
 // to assert that that code is compatible with this version of the grpc package.
 //
 // This constant may be renamed in the future if a change in the generated code
 // requires a synchronised update of grpc-go and protoc-gen-go. This constant
 // should not be referenced from any other code.
-const SupportPackageIsVersion2 = true
+const SupportPackageIsVersion3 = true