diff --git a/src/pkg/runtime/sys_freebsd_amd64.s b/src/pkg/runtime/sys_freebsd_amd64.s
index b14b66556cf..fbed690d185 100644
--- a/src/pkg/runtime/sys_freebsd_amd64.s
+++ b/src/pkg/runtime/sys_freebsd_amd64.s
@@ -231,5 +231,5 @@ TEXT runtime·sysctl(SB),7,$0
 
 TEXT runtime·osyield(SB),7,$-4
 	MOVL	$331, AX		// sys_sched_yield
-	INT	$0x80
+	SYSCALL
 	RET