diff --git a/src/core/ddsi/include/dds/ddsi/ddsi_serdata.h b/src/core/ddsi/include/dds/ddsi/ddsi_serdata.h
index dfd9f431b1..6c3eca6d1e 100644
--- a/src/core/ddsi/include/dds/ddsi/ddsi_serdata.h
+++ b/src/core/ddsi/include/dds/ddsi/ddsi_serdata.h
@@ -307,12 +307,12 @@ DDS_INLINE_EXPORT inline bool ddsi_serdata_eqkey (const struct ddsi_serdata *a,
 }
 
 /** @component typesupport_if */
-DDS_INLINE_EXPORT inline bool ddsi_serdata_print (const struct ddsi_serdata *d, char *buf, size_t size) {
+DDS_INLINE_EXPORT inline size_t ddsi_serdata_print (const struct ddsi_serdata *d, char *buf, size_t size) {
   return d->ops->print (d->type, d, buf, size);
 }
 
 /** @component typesupport_if */
-DDS_INLINE_EXPORT inline bool ddsi_serdata_print_untyped (const struct ddsi_sertype *type, const struct ddsi_serdata *d, char *buf, size_t size) {
+DDS_INLINE_EXPORT inline size_t ddsi_serdata_print_untyped (const struct ddsi_sertype *type, const struct ddsi_serdata *d, char *buf, size_t size) {
   if (d->ops->print)
     return d->ops->print (type, d, buf, size);
   else
diff --git a/src/core/ddsi/src/ddsi_serdata.c b/src/core/ddsi/src/ddsi_serdata.c
index e46b4d9608..6b015e380c 100644
--- a/src/core/ddsi/src/ddsi_serdata.c
+++ b/src/core/ddsi/src/ddsi_serdata.c
@@ -77,8 +77,8 @@ DDS_EXPORT extern inline void ddsi_serdata_to_ser_unref (struct ddsi_serdata *d,
 DDS_EXPORT extern inline bool ddsi_serdata_to_sample (const struct ddsi_serdata *d, void *sample, void **bufptr, void *buflim);
 DDS_EXPORT extern inline bool ddsi_serdata_untyped_to_sample (const struct ddsi_sertype *type, const struct ddsi_serdata *d, void *sample, void **bufptr, void *buflim);
 DDS_EXPORT extern inline bool ddsi_serdata_eqkey (const struct ddsi_serdata *a, const struct ddsi_serdata *b);
-DDS_EXPORT extern inline bool ddsi_serdata_print (const struct ddsi_serdata *d, char *buf, size_t size);
-DDS_EXPORT extern inline bool ddsi_serdata_print_untyped (const struct ddsi_sertype *type, const struct ddsi_serdata *d, char *buf, size_t size);
+DDS_EXPORT extern inline size_t ddsi_serdata_print (const struct ddsi_serdata *d, char *buf, size_t size);
+DDS_EXPORT extern inline size_t ddsi_serdata_print_untyped (const struct ddsi_sertype *type, const struct ddsi_serdata *d, char *buf, size_t size);
 DDS_EXPORT extern inline void ddsi_serdata_get_keyhash (const struct ddsi_serdata *d, struct ddsi_keyhash *buf, bool force_md5);
 DDS_EXPORT extern inline struct ddsi_serdata *ddsi_serdata_from_loaned_sample (const struct ddsi_sertype *type, enum ddsi_serdata_kind kind, const char *sample, struct dds_loaned_sample *loan, bool will_require_cdr);
 DDS_EXPORT extern inline struct ddsi_serdata *ddsi_serdata_from_psmx (const struct ddsi_sertype *type, struct dds_loaned_sample *data);