diff --git a/cpukit/libcsupport/src/_free_r.c b/cpukit/libcsupport/src/_free_r.c
index d5a91dc36a..9b3eb5c285 100644
--- a/cpukit/libcsupport/src/_free_r.c
+++ b/cpukit/libcsupport/src/_free_r.c
@@ -15,7 +15,7 @@
 #include "config.h"
 #endif
 
-#ifdef RTEMS_NEWLIB
+#if defined(RTEMS_NEWLIB) && !defined(HAVE__FREE_R)
 #include <sys/reent.h>
 #include <stdlib.h>
 
diff --git a/cpukit/libcsupport/src/_malloc_r.c b/cpukit/libcsupport/src/_malloc_r.c
index 63ec6d1257..9a30097324 100644
--- a/cpukit/libcsupport/src/_malloc_r.c
+++ b/cpukit/libcsupport/src/_malloc_r.c
@@ -15,7 +15,7 @@
 #include "config.h"
 #endif
 
-#ifdef RTEMS_NEWLIB
+#if defined(RTEMS_NEWLIB) && !defined(HAVE__MALLOC_R)
 #include <sys/reent.h>
 #include <stdlib.h>