diff --git a/src/arch/arm/freebsd/se_workload.cc b/src/arch/arm/freebsd/se_workload.cc
index 661a4a9d2b..12f966ed5d 100644
--- a/src/arch/arm/freebsd/se_workload.cc
+++ b/src/arch/arm/freebsd/se_workload.cc
@@ -34,6 +34,9 @@
 #include "arch/arm/freebsd/se_workload.hh"
 
 #include <sys/syscall.h>
+#if !defined ( __GNU_LIBRARY__ ) && defined(__FreeBSD__)
+#include <sys/sysctl.h>
+#endif
 
 #include "arch/arm/process.hh"
 #include "base/loader/object_file.hh"
diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
index 0872b0f006..763c30f550 100644
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -110,6 +110,8 @@
 
 #if defined(__APPLE__) && defined(__MACH__) && !defined(CMSG_ALIGN)
 #define CMSG_ALIGN(len) (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1))
+#elif defined(__FreeBSD__) && !defined(CMSG_ALIGN)
+#define CMSG_ALIGN(n) _ALIGN(n)
 #endif
 
 //////////////////////////////////////////////////////////////////////