diff --git a/freebsd/sys/sys/sysctl.h b/freebsd/sys/sys/sysctl.h
index 35c0e984..16d4d2db 100644
--- a/freebsd/sys/sys/sysctl.h
+++ b/freebsd/sys/sys/sysctl.h
@@ -747,9 +747,7 @@ void	sysctl_lock(void);
 void	sysctl_unlock(void);
 int	sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
 
-#ifndef __rtems__
 #else	/* !_KERNEL */
-#endif /* __rtems__ */
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS
diff --git a/rtemsbsd/include/machine/rtems-bsd-syscall-api.h b/rtemsbsd/include/machine/rtems-bsd-syscall-api.h
index 97790212..d96f1793 100644
--- a/rtemsbsd/include/machine/rtems-bsd-syscall-api.h
+++ b/rtemsbsd/include/machine/rtems-bsd-syscall-api.h
@@ -47,6 +47,7 @@
 #include <sys/cdefs.h>
 #include <sys/select.h>
 #include <sys/socket.h>
+#include <sys/sysctl.h>
 
 __BEGIN_DECLS
 
@@ -83,6 +84,12 @@ int	shutdown(int, int);
 
 int	socket(int, int, int);
 
+int	sysctl(int *, u_int, void *, size_t *, void *, size_t);
+
+int	sysctlbyname(const char *, void *, size_t *, void *, size_t);
+
+int	sysctlnametomib(const char *, int *, size_t *);
+
 __END_DECLS
 
 #endif /* _RTEMS_BSD_MACHINE_RTEMS_BSD_SYSCALL_API_H_ */
diff --git a/rtemsbsd/rtems/rtems-bsd-sysctl.c b/rtemsbsd/rtems/rtems-bsd-sysctl.c
index bd9f31f6..7fbb5398 100644
--- a/rtemsbsd/rtems/rtems-bsd-sysctl.c
+++ b/rtemsbsd/rtems/rtems-bsd-sysctl.c
@@ -38,6 +38,7 @@
  */
 
 #include <machine/rtems-bsd-config.h>
+#include <machine/rtems-bsd-syscall-api.h>
 
 #include <rtems/bsd/sys/types.h>
 #include <sys/sysctl.h>
diff --git a/rtemsbsd/rtems/rtems-bsd-sysctlbyname.c b/rtemsbsd/rtems/rtems-bsd-sysctlbyname.c
index a0ba592b..37a4f8df 100644
--- a/rtemsbsd/rtems/rtems-bsd-sysctlbyname.c
+++ b/rtemsbsd/rtems/rtems-bsd-sysctlbyname.c
@@ -19,6 +19,7 @@
  */
 
 #include <machine/rtems-bsd-config.h>
+#include <machine/rtems-bsd-syscall-api.h>
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
diff --git a/rtemsbsd/rtems/rtems-bsd-sysctlnametomib.c b/rtemsbsd/rtems/rtems-bsd-sysctlnametomib.c
index 6f65fa5c..496cafae 100644
--- a/rtemsbsd/rtems/rtems-bsd-sysctlnametomib.c
+++ b/rtemsbsd/rtems/rtems-bsd-sysctlnametomib.c
@@ -35,6 +35,7 @@
  */
 
 #include <machine/rtems-bsd-config.h>
+#include <machine/rtems-bsd-syscall-api.h>
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");