diff --git a/src/os/rtems/inc/os-rtems.h b/src/os/rtems/inc/os-rtems.h
index e18ed3b15..b768cc695 100644
--- a/src/os/rtems/inc/os-rtems.h
+++ b/src/os/rtems/inc/os-rtems.h
@@ -60,6 +60,9 @@
 #define OSAL_UNRESOLVED_SYMBOL  rtems_rtl_unresolved_name
 #define OSAL_UNRESOLVED_ITERATE rtems_rtl_unresolved_interate
 
+/* RTEMS 4.x does not implement thread names, so this becomes a no-op */
+#define pthread_setname_np(...)
+
 #else
 
 #define OSAL_HEAP_INFO_BLOCK    Heap_Information_block