diff --git a/cpukit/libcsupport/src/__sbrk.c b/cpukit/libcsupport/src/__sbrk.c
index a5b953d2a5..c80178f9f0 100644
--- a/cpukit/libcsupport/src/__sbrk.c
+++ b/cpukit/libcsupport/src/__sbrk.c
@@ -17,8 +17,7 @@
 #include "config.h"
 #endif
 
-#include <rtems.h>
-#if !defined(RTEMS_UNIX)
+#if defined(RTEMS_NEWLIB) && !defined(HAVE___SBRK)
 
 #include <errno.h>