diff --git a/rmw/include/rmw/raw_message.h b/rmw/include/rmw/raw_message.h
index 6e2fbb68..c4da144e 100644
--- a/rmw/include/rmw/raw_message.h
+++ b/rmw/include/rmw/raw_message.h
@@ -22,6 +22,7 @@ extern "C"
 
 #include "rcutils/allocator.h"
 
+#include "rmw/macros.h"
 #include "rmw/types.h"
 #include "rmw/visibility_control.h"
 
@@ -30,6 +31,7 @@ extern "C"
  * \return rmw_message_raw_t a zero initialized raw message struct
  */
 RMW_PUBLIC
+RMW_WARN_UNUSED
 rmw_message_raw_t
 rmw_get_zero_initialized_raw_message(void);
 
@@ -45,6 +47,7 @@ rmw_get_zero_initialized_raw_message(void);
  * \param allocator the allocator to use for the memory allocation.
  */
 RMW_PUBLIC
+RMW_WARN_UNUSED
 rmw_ret_t
 rmw_raw_message_init(
   rmw_message_raw_t * msg,
@@ -60,6 +63,7 @@ rmw_raw_message_init(
  * \param msg pointer to the raw message to be cleaned up
  */
 RMW_PUBLIC
+RMW_WARN_UNUSED
 rmw_ret_t
 rmw_raw_message_fini(rmw_message_raw_t * msg);
 
@@ -75,6 +79,7 @@ rmw_raw_message_fini(rmw_message_raw_t * msg);
  * \param new_size the new size of the internal buffer
  */
 RMW_PUBLIC
+RMW_WARN_UNUSED
 rmw_ret_t
 rmw_raw_message_resize(rmw_message_raw_t * msg, unsigned int new_size);
 
diff --git a/rmw/src/raw_message.c b/rmw/src/raw_message.c
index e07211a2..2213aed8 100644
--- a/rmw/src/raw_message.c
+++ b/rmw/src/raw_message.c
@@ -17,7 +17,6 @@
 #include "rmw/error_handling.h"
 #include "rmw/raw_message.h"
 
-RMW_PUBLIC
 rmw_message_raw_t
 rmw_get_zero_initialized_raw_message(void)
 {
@@ -30,7 +29,6 @@ rmw_get_zero_initialized_raw_message(void)
   return raw_message;
 }
 
-RMW_PUBLIC
 rmw_ret_t
 rmw_raw_message_init(
   rmw_message_raw_t * msg,
@@ -62,7 +60,6 @@ rmw_raw_message_init(
   return RMW_RET_OK;
 }
 
-RMW_PUBLIC
 rmw_ret_t
 rmw_raw_message_fini(rmw_message_raw_t * msg)
 {
@@ -84,7 +81,6 @@ rmw_raw_message_fini(rmw_message_raw_t * msg)
   return RMW_RET_OK;
 }
 
-RMW_PUBLIC
 rmw_ret_t
 rmw_raw_message_resize(rmw_message_raw_t * msg, unsigned int new_size)
 {
@@ -103,7 +99,7 @@ rmw_raw_message_resize(rmw_message_raw_t * msg, unsigned int new_size)
     return RMW_RET_OK;
   }
 
-  msg->buffer = allocator->reallocate(msg->buffer, new_size * sizeof(char), allocator->state);
+  msg->buffer = rcutils_reallocf(msg->buffer, new_size * sizeof(char), allocator);
   RCUTILS_CHECK_FOR_NULL_WITH_MSG(
     msg->buffer,
     "failed to reallocate memory for raw message",