diff --git a/rmw_fastrtps_dynamic_cpp/src/type_support_common.cpp b/rmw_fastrtps_dynamic_cpp/src/type_support_common.cpp
index e139dcff6..e3cc7f459 100644
--- a/rmw_fastrtps_dynamic_cpp/src/type_support_common.cpp
+++ b/rmw_fastrtps_dynamic_cpp/src/type_support_common.cpp
@@ -25,12 +25,15 @@
 bool
 using_introspection_c_typesupport(const char * typesupport_identifier)
 {
-  return typesupport_identifier == rosidl_typesupport_introspection_c__identifier;
+  return strcmp(
+    typesupport_identifier,
+    rosidl_typesupport_introspection_c__identifier) == 0;
 }
 
 bool
 using_introspection_cpp_typesupport(const char * typesupport_identifier)
 {
-  return typesupport_identifier ==
-         rosidl_typesupport_introspection_cpp::typesupport_identifier;
+  return strcmp(
+    typesupport_identifier,
+    rosidl_typesupport_introspection_cpp::typesupport_identifier) == 0;
 }