diff --git a/src/runtime/sys_freebsd_arm64.s b/src/runtime/sys_freebsd_arm64.s
index ef0366277f..e9b2abcb65 100644
--- a/src/runtime/sys_freebsd_arm64.s
+++ b/src/runtime/sys_freebsd_arm64.s
@@ -14,9 +14,6 @@
 
 #define CLOCK_REALTIME		0
 #define CLOCK_MONOTONIC		4
-#define F_GETFL			3
-#define F_SETFL			4
-#define O_NONBLOCK		4
 
 #define SYS_exit		1
 #define SYS_read		3
diff --git a/src/runtime/sys_freebsd_riscv64.s b/src/runtime/sys_freebsd_riscv64.s
index be6966b9aa..fd69ba695e 100644
--- a/src/runtime/sys_freebsd_riscv64.s
+++ b/src/runtime/sys_freebsd_riscv64.s
@@ -13,9 +13,6 @@
 
 #define CLOCK_REALTIME		0
 #define CLOCK_MONOTONIC		4
-#define F_GETFL			3
-#define F_SETFL			4
-#define O_NONBLOCK		4
 
 #define SYS_exit		1
 #define SYS_read		3
diff --git a/src/runtime/sys_netbsd_arm64.s b/src/runtime/sys_netbsd_arm64.s
index 611b9e1d74..2c0324b7a6 100644
--- a/src/runtime/sys_netbsd_arm64.s
+++ b/src/runtime/sys_netbsd_arm64.s
@@ -13,9 +13,6 @@
 
 #define CLOCK_REALTIME		0
 #define CLOCK_MONOTONIC		3
-#define F_GETFL			3
-#define F_SETFL			4
-#define O_NONBLOCK		4
 
 #define SYS_exit			1
 #define SYS_read			3