Fix comparison
diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index a862401..aede337 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -119,7 +119,7 @@
     gpr_strvec_add(&b, gpr_strdup("RECV_TRAILING_METADATA"));
   }
 
-  if (op->cancel_error != GRPC_STATUS_OK) {
+  if (op->cancel_error != GRPC_ERROR_NONE) {
     if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
     first = 0;
     const char *msg = grpc_error_string(op->cancel_error);
@@ -128,7 +128,7 @@
     gpr_strvec_add(&b, tmp);
   }
 
-  if (op->close_error != GRPC_STATUS_OK) {
+  if (op->close_error != GRPC_ERROR_NONE) {
     if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
     first = 0;
     const char *msg = grpc_error_string(op->close_error);