diff --git a/cpukit/include/rtems/score/rbtree.h b/cpukit/include/rtems/score/rbtree.h
index 253ef296bc..04d733ea50 100644
--- a/cpukit/include/rtems/score/rbtree.h
+++ b/cpukit/include/rtems/score/rbtree.h
@@ -38,7 +38,7 @@
 #ifndef _RTEMS_SCORE_RBTREE_H
 #define _RTEMS_SCORE_RBTREE_H
 
-#include <sys/tree.h>
+#include <rtems/score/bsd-tree.h>
 #include <rtems/score/basedefs.h>
 #include <rtems/score/assert.h>
 
diff --git a/spec/build/cpukit/librtemscpu.yml b/spec/build/cpukit/librtemscpu.yml
index 196a8acd4e..1311ea5a99 100644
--- a/spec/build/cpukit/librtemscpu.yml
+++ b/spec/build/cpukit/librtemscpu.yml
@@ -337,6 +337,7 @@ install:
   - cpukit/include/rtems/score/assert.h
   - cpukit/include/rtems/score/atomic.h
   - cpukit/include/rtems/score/basedefs.h
+  - cpukit/include/rtems/score/bsd-tree.h
   - cpukit/include/rtems/score/chain.h
   - cpukit/include/rtems/score/chainimpl.h
   - cpukit/include/rtems/score/context.h