diff --git a/src/haproxy.c b/src/haproxy.c
index ae790c4..681109d 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -50,6 +50,10 @@
 #define __USE_GNU
 #include <sched.h>
 #undef __USE_GNU
+#ifdef __FreeBSD__
+#include <sys/param.h>
+#include <sys/cpuset.h>
+#endif
 #endif
 
 #ifdef DEBUG_FULL
@@ -1780,8 +1784,12 @@
 		if (proc < global.nbproc &&  /* child */
 		    proc < LONGBITS &&       /* only the first 32/64 processes may be pinned */
 		    global.cpu_map[proc])    /* only do this if the process has a CPU map */
+#ifdef __FreeBSD__
+			cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1, sizeof(unsigned long), (void *)&global.cpu_map[proc]);
+#else
 			sched_setaffinity(0, sizeof(unsigned long), (void *)&global.cpu_map[proc]);
 #endif
+#endif
 		/* close the pidfile both in children and father */
 		if (pidfd >= 0) {
 			//lseek(pidfd, 0, SEEK_SET);  /* debug: emulate eglibc bug */