diff --git a/rmw_connextdds_common/src/common/rmw_type_support.cpp b/rmw_connextdds_common/src/common/rmw_type_support.cpp
index 2f3b3a34..04b0a94d 100644
--- a/rmw_connextdds_common/src/common/rmw_type_support.cpp
+++ b/rmw_connextdds_common/src/common/rmw_type_support.cpp
@@ -683,7 +683,7 @@ void RMW_Connext_MessageTypeSupport::type_info(
 
   unbounded = !full_bounded;
 
-  if (unbounded && serialized_size_max == 0) {
+  if (full_bounded && serialized_size_max == 0) {
     /* Empty message */
     empty = true;
     serialized_size_max = 1;